diff --git a/esphome/codegen.py b/esphome/codegen.py
index 4f9f67245d..5e1e934e58 100644
--- a/esphome/codegen.py
+++ b/esphome/codegen.py
@@ -81,4 +81,5 @@ from esphome.cpp_types import (  # noqa
     GPIOPin,
     InternalGPIOPin,
     gpio_Flags,
+    EntityCategory,
 )
diff --git a/esphome/components/am43/sensor.py b/esphome/components/am43/sensor.py
index c88e529a0c..68c85d0e9c 100644
--- a/esphome/components/am43/sensor.py
+++ b/esphome/components/am43/sensor.py
@@ -4,7 +4,8 @@ from esphome.components import sensor, ble_client
 from esphome.const import (
     CONF_ID,
     CONF_BATTERY_LEVEL,
-    ICON_BATTERY,
+    DEVICE_CLASS_BATTERY,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     CONF_ILLUMINANCE,
     ICON_BRIGHTNESS_5,
     UNIT_PERCENT,
@@ -20,10 +21,15 @@ CONFIG_SCHEMA = (
         {
             cv.GenerateID(): cv.declare_id(Am43),
             cv.Optional(CONF_BATTERY_LEVEL): sensor.sensor_schema(
-                UNIT_PERCENT, ICON_BATTERY, 0
+                unit_of_measurement=UNIT_PERCENT,
+                device_class=DEVICE_CLASS_BATTERY,
+                accuracy_decimals=0,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
             cv.Optional(CONF_ILLUMINANCE): sensor.sensor_schema(
-                UNIT_PERCENT, ICON_BRIGHTNESS_5, 0
+                unit_of_measurement=UNIT_PERCENT,
+                icon=ICON_BRIGHTNESS_5,
+                accuracy_decimals=0,
             ),
         }
     )
diff --git a/esphome/components/api/api.proto b/esphome/components/api/api.proto
index b1ac998608..0eb7ead735 100644
--- a/esphome/components/api/api.proto
+++ b/esphome/components/api/api.proto
@@ -203,6 +203,14 @@ message SubscribeStatesRequest {
   // Empty
 }
 
+// ==================== COMMON =====================
+
+enum EntityCategory {
+  ENTITY_CATEGORY_NONE = 0;
+  ENTITY_CATEGORY_CONFIG = 1;
+  ENTITY_CATEGORY_DIAGNOSTIC = 2;
+}
+
 // ==================== BINARY SENSOR ====================
 message ListEntitiesBinarySensorResponse {
   option (id) = 12;
@@ -218,6 +226,7 @@ message ListEntitiesBinarySensorResponse {
   bool is_status_binary_sensor = 6;
   bool disabled_by_default = 7;
   string icon = 8;
+  EntityCategory entity_category = 9;
 }
 message BinarySensorStateResponse {
   option (id) = 21;
@@ -249,6 +258,7 @@ message ListEntitiesCoverResponse {
   string device_class = 8;
   bool disabled_by_default = 9;
   string icon = 10;
+  EntityCategory entity_category = 11;
 }
 
 enum LegacyCoverState {
@@ -318,6 +328,7 @@ message ListEntitiesFanResponse {
   int32 supported_speed_count = 8;
   bool disabled_by_default = 9;
   string icon = 10;
+  EntityCategory entity_category = 11;
 }
 enum FanSpeed {
   FAN_SPEED_LOW = 0;
@@ -394,6 +405,7 @@ message ListEntitiesLightResponse {
   repeated string effects = 11;
   bool disabled_by_default = 13;
   string icon = 14;
+  EntityCategory entity_category = 15;
 }
 message LightStateResponse {
   option (id) = 24;
@@ -482,6 +494,7 @@ message ListEntitiesSensorResponse {
   // Last reset type removed in 2021.9.0
   SensorLastResetType legacy_last_reset_type = 11;
   bool disabled_by_default = 12;
+  EntityCategory entity_category = 13;
 }
 message SensorStateResponse {
   option (id) = 25;
@@ -510,6 +523,7 @@ message ListEntitiesSwitchResponse {
   string icon = 5;
   bool assumed_state = 6;
   bool disabled_by_default = 7;
+  EntityCategory entity_category = 8;
 }
 message SwitchStateResponse {
   option (id) = 26;
@@ -543,6 +557,7 @@ message ListEntitiesTextSensorResponse {
 
   string icon = 5;
   bool disabled_by_default = 6;
+  EntityCategory entity_category = 7;
 }
 message TextSensorStateResponse {
   option (id) = 27;
@@ -704,6 +719,7 @@ message ListEntitiesCameraResponse {
   string unique_id = 4;
   bool disabled_by_default = 5;
   string icon = 6;
+  EntityCategory entity_category = 7;
 }
 
 message CameraImageResponse {
@@ -798,6 +814,7 @@ message ListEntitiesClimateResponse {
   repeated string supported_custom_presets = 17;
   bool disabled_by_default = 18;
   string icon = 19;
+  EntityCategory entity_category = 20;
 }
 message ClimateStateResponse {
   option (id) = 47;
@@ -866,6 +883,7 @@ message ListEntitiesNumberResponse {
   float max_value = 7;
   float step = 8;
   bool disabled_by_default = 9;
+  EntityCategory entity_category = 10;
 }
 message NumberStateResponse {
   option (id) = 50;
@@ -903,6 +921,7 @@ message ListEntitiesSelectResponse {
   string icon = 5;
   repeated string options = 6;
   bool disabled_by_default = 7;
+  EntityCategory entity_category = 8;
 }
 message SelectStateResponse {
   option (id) = 53;
diff --git a/esphome/components/api/api_connection.cpp b/esphome/components/api/api_connection.cpp
index 79c53ee840..715a4f48c1 100644
--- a/esphome/components/api/api_connection.cpp
+++ b/esphome/components/api/api_connection.cpp
@@ -184,6 +184,7 @@ bool APIConnection::send_binary_sensor_info(binary_sensor::BinarySensor *binary_
   msg.is_status_binary_sensor = binary_sensor->is_status_binary_sensor();
   msg.disabled_by_default = binary_sensor->is_disabled_by_default();
   msg.icon = binary_sensor->get_icon();
+  msg.entity_category = static_cast<enums::EntityCategory>(binary_sensor->get_entity_category());
   return this->send_list_entities_binary_sensor_response(msg);
 }
 #endif
@@ -217,6 +218,7 @@ bool APIConnection::send_cover_info(cover::Cover *cover) {
   msg.device_class = cover->get_device_class();
   msg.disabled_by_default = cover->is_disabled_by_default();
   msg.icon = cover->get_icon();
+  msg.entity_category = static_cast<enums::EntityCategory>(cover->get_entity_category());
   return this->send_list_entities_cover_response(msg);
 }
 void APIConnection::cover_command(const CoverCommandRequest &msg) {
@@ -283,6 +285,7 @@ bool APIConnection::send_fan_info(fan::FanState *fan) {
   msg.supported_speed_count = traits.supported_speed_count();
   msg.disabled_by_default = fan->is_disabled_by_default();
   msg.icon = fan->get_icon();
+  msg.entity_category = static_cast<enums::EntityCategory>(fan->get_entity_category());
   return this->send_list_entities_fan_response(msg);
 }
 void APIConnection::fan_command(const FanCommandRequest &msg) {
@@ -346,6 +349,7 @@ bool APIConnection::send_light_info(light::LightState *light) {
 
   msg.disabled_by_default = light->is_disabled_by_default();
   msg.icon = light->get_icon();
+  msg.entity_category = static_cast<enums::EntityCategory>(light->get_entity_category());
 
   for (auto mode : traits.get_supported_color_modes())
     msg.supported_color_modes.push_back(static_cast<enums::ColorMode>(mode));
@@ -432,7 +436,7 @@ bool APIConnection::send_sensor_info(sensor::Sensor *sensor) {
   msg.device_class = sensor->get_device_class();
   msg.state_class = static_cast<enums::SensorStateClass>(sensor->get_state_class());
   msg.disabled_by_default = sensor->is_disabled_by_default();
-
+  msg.entity_category = static_cast<enums::EntityCategory>(sensor->get_entity_category());
   return this->send_list_entities_sensor_response(msg);
 }
 #endif
@@ -456,6 +460,7 @@ bool APIConnection::send_switch_info(switch_::Switch *a_switch) {
   msg.icon = a_switch->get_icon();
   msg.assumed_state = a_switch->assumed_state();
   msg.disabled_by_default = a_switch->is_disabled_by_default();
+  msg.entity_category = static_cast<enums::EntityCategory>(a_switch->get_entity_category());
   return this->send_list_entities_switch_response(msg);
 }
 void APIConnection::switch_command(const SwitchCommandRequest &msg) {
@@ -491,6 +496,7 @@ bool APIConnection::send_text_sensor_info(text_sensor::TextSensor *text_sensor)
     msg.unique_id = get_default_unique_id("text_sensor", text_sensor);
   msg.icon = text_sensor->get_icon();
   msg.disabled_by_default = text_sensor->is_disabled_by_default();
+  msg.entity_category = static_cast<enums::EntityCategory>(text_sensor->get_entity_category());
   return this->send_list_entities_text_sensor_response(msg);
 }
 #endif
@@ -537,6 +543,7 @@ bool APIConnection::send_climate_info(climate::Climate *climate) {
 
   msg.disabled_by_default = climate->is_disabled_by_default();
   msg.icon = climate->get_icon();
+  msg.entity_category = static_cast<enums::EntityCategory>(climate->get_entity_category());
 
   msg.supports_current_temperature = traits.get_supports_current_temperature();
   msg.supports_two_point_target_temperature = traits.get_supports_two_point_target_temperature();
@@ -611,6 +618,7 @@ bool APIConnection::send_number_info(number::Number *number) {
   msg.unique_id = get_default_unique_id("number", number);
   msg.icon = number->get_icon();
   msg.disabled_by_default = number->is_disabled_by_default();
+  msg.entity_category = static_cast<enums::EntityCategory>(number->get_entity_category());
 
   msg.min_value = number->traits.get_min_value();
   msg.max_value = number->traits.get_max_value();
@@ -648,6 +656,7 @@ bool APIConnection::send_select_info(select::Select *select) {
   msg.unique_id = get_default_unique_id("select", select);
   msg.icon = select->get_icon();
   msg.disabled_by_default = select->is_disabled_by_default();
+  msg.entity_category = static_cast<enums::EntityCategory>(select->get_entity_category());
 
   for (const auto &option : select->traits.get_options())
     msg.options.push_back(option);
@@ -681,6 +690,7 @@ bool APIConnection::send_camera_info(esp32_camera::ESP32Camera *camera) {
   msg.unique_id = get_default_unique_id("camera", camera);
   msg.disabled_by_default = camera->is_disabled_by_default();
   msg.icon = camera->get_icon();
+  msg.entity_category = static_cast<enums::EntityCategory>(camera->get_entity_category());
   return this->send_list_entities_camera_response(msg);
 }
 void APIConnection::camera_image(const CameraImageRequest &msg) {
diff --git a/esphome/components/api/api_pb2.cpp b/esphome/components/api/api_pb2.cpp
index 1d59d98f52..7bfa1e9edb 100644
--- a/esphome/components/api/api_pb2.cpp
+++ b/esphome/components/api/api_pb2.cpp
@@ -6,6 +6,18 @@
 namespace esphome {
 namespace api {
 
+template<> const char *proto_enum_to_string<enums::EntityCategory>(enums::EntityCategory value) {
+  switch (value) {
+    case enums::ENTITY_CATEGORY_NONE:
+      return "ENTITY_CATEGORY_NONE";
+    case enums::ENTITY_CATEGORY_CONFIG:
+      return "ENTITY_CATEGORY_CONFIG";
+    case enums::ENTITY_CATEGORY_DIAGNOSTIC:
+      return "ENTITY_CATEGORY_DIAGNOSTIC";
+    default:
+      return "UNKNOWN";
+  }
+}
 template<> const char *proto_enum_to_string<enums::LegacyCoverState>(enums::LegacyCoverState value) {
   switch (value) {
     case enums::LEGACY_COVER_STATE_OPEN:
@@ -519,6 +531,10 @@ bool ListEntitiesBinarySensorResponse::decode_varint(uint32_t field_id, ProtoVar
       this->disabled_by_default = value.as_bool();
       return true;
     }
+    case 9: {
+      this->entity_category = value.as_enum<enums::EntityCategory>();
+      return true;
+    }
     default:
       return false;
   }
@@ -568,6 +584,7 @@ void ListEntitiesBinarySensorResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_bool(6, this->is_status_binary_sensor);
   buffer.encode_bool(7, this->disabled_by_default);
   buffer.encode_string(8, this->icon);
+  buffer.encode_enum<enums::EntityCategory>(9, this->entity_category);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesBinarySensorResponse::dump_to(std::string &out) const {
@@ -605,6 +622,10 @@ void ListEntitiesBinarySensorResponse::dump_to(std::string &out) const {
   out.append("  icon: ");
   out.append("'").append(this->icon).append("'");
   out.append("\n");
+
+  out.append("  entity_category: ");
+  out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -674,6 +695,10 @@ bool ListEntitiesCoverResponse::decode_varint(uint32_t field_id, ProtoVarInt val
       this->disabled_by_default = value.as_bool();
       return true;
     }
+    case 11: {
+      this->entity_category = value.as_enum<enums::EntityCategory>();
+      return true;
+    }
     default:
       return false;
   }
@@ -725,6 +750,7 @@ void ListEntitiesCoverResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_string(8, this->device_class);
   buffer.encode_bool(9, this->disabled_by_default);
   buffer.encode_string(10, this->icon);
+  buffer.encode_enum<enums::EntityCategory>(11, this->entity_category);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesCoverResponse::dump_to(std::string &out) const {
@@ -770,6 +796,10 @@ void ListEntitiesCoverResponse::dump_to(std::string &out) const {
   out.append("  icon: ");
   out.append("'").append(this->icon).append("'");
   out.append("\n");
+
+  out.append("  entity_category: ");
+  out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -958,6 +988,10 @@ bool ListEntitiesFanResponse::decode_varint(uint32_t field_id, ProtoVarInt value
       this->disabled_by_default = value.as_bool();
       return true;
     }
+    case 11: {
+      this->entity_category = value.as_enum<enums::EntityCategory>();
+      return true;
+    }
     default:
       return false;
   }
@@ -1005,6 +1039,7 @@ void ListEntitiesFanResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_int32(8, this->supported_speed_count);
   buffer.encode_bool(9, this->disabled_by_default);
   buffer.encode_string(10, this->icon);
+  buffer.encode_enum<enums::EntityCategory>(11, this->entity_category);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesFanResponse::dump_to(std::string &out) const {
@@ -1051,6 +1086,10 @@ void ListEntitiesFanResponse::dump_to(std::string &out) const {
   out.append("  icon: ");
   out.append("'").append(this->icon).append("'");
   out.append("\n");
+
+  out.append("  entity_category: ");
+  out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -1277,6 +1316,10 @@ bool ListEntitiesLightResponse::decode_varint(uint32_t field_id, ProtoVarInt val
       this->disabled_by_default = value.as_bool();
       return true;
     }
+    case 15: {
+      this->entity_category = value.as_enum<enums::EntityCategory>();
+      return true;
+    }
     default:
       return false;
   }
@@ -1344,6 +1387,7 @@ void ListEntitiesLightResponse::encode(ProtoWriteBuffer buffer) const {
   }
   buffer.encode_bool(13, this->disabled_by_default);
   buffer.encode_string(14, this->icon);
+  buffer.encode_enum<enums::EntityCategory>(15, this->entity_category);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesLightResponse::dump_to(std::string &out) const {
@@ -1411,6 +1455,10 @@ void ListEntitiesLightResponse::dump_to(std::string &out) const {
   out.append("  icon: ");
   out.append("'").append(this->icon).append("'");
   out.append("\n");
+
+  out.append("  entity_category: ");
+  out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -1870,6 +1918,10 @@ bool ListEntitiesSensorResponse::decode_varint(uint32_t field_id, ProtoVarInt va
       this->disabled_by_default = value.as_bool();
       return true;
     }
+    case 13: {
+      this->entity_category = value.as_enum<enums::EntityCategory>();
+      return true;
+    }
     default:
       return false;
   }
@@ -1927,6 +1979,7 @@ void ListEntitiesSensorResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_enum<enums::SensorStateClass>(10, this->state_class);
   buffer.encode_enum<enums::SensorLastResetType>(11, this->legacy_last_reset_type);
   buffer.encode_bool(12, this->disabled_by_default);
+  buffer.encode_enum<enums::EntityCategory>(13, this->entity_category);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesSensorResponse::dump_to(std::string &out) const {
@@ -1981,6 +2034,10 @@ void ListEntitiesSensorResponse::dump_to(std::string &out) const {
   out.append("  disabled_by_default: ");
   out.append(YESNO(this->disabled_by_default));
   out.append("\n");
+
+  out.append("  entity_category: ");
+  out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -2043,6 +2100,10 @@ bool ListEntitiesSwitchResponse::decode_varint(uint32_t field_id, ProtoVarInt va
       this->disabled_by_default = value.as_bool();
       return true;
     }
+    case 8: {
+      this->entity_category = value.as_enum<enums::EntityCategory>();
+      return true;
+    }
     default:
       return false;
   }
@@ -2087,6 +2148,7 @@ void ListEntitiesSwitchResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_string(5, this->icon);
   buffer.encode_bool(6, this->assumed_state);
   buffer.encode_bool(7, this->disabled_by_default);
+  buffer.encode_enum<enums::EntityCategory>(8, this->entity_category);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesSwitchResponse::dump_to(std::string &out) const {
@@ -2120,6 +2182,10 @@ void ListEntitiesSwitchResponse::dump_to(std::string &out) const {
   out.append("  disabled_by_default: ");
   out.append(YESNO(this->disabled_by_default));
   out.append("\n");
+
+  out.append("  entity_category: ");
+  out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -2207,6 +2273,10 @@ bool ListEntitiesTextSensorResponse::decode_varint(uint32_t field_id, ProtoVarIn
       this->disabled_by_default = value.as_bool();
       return true;
     }
+    case 7: {
+      this->entity_category = value.as_enum<enums::EntityCategory>();
+      return true;
+    }
     default:
       return false;
   }
@@ -2250,6 +2320,7 @@ void ListEntitiesTextSensorResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_string(4, this->unique_id);
   buffer.encode_string(5, this->icon);
   buffer.encode_bool(6, this->disabled_by_default);
+  buffer.encode_enum<enums::EntityCategory>(7, this->entity_category);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesTextSensorResponse::dump_to(std::string &out) const {
@@ -2279,6 +2350,10 @@ void ListEntitiesTextSensorResponse::dump_to(std::string &out) const {
   out.append("  disabled_by_default: ");
   out.append(YESNO(this->disabled_by_default));
   out.append("\n");
+
+  out.append("  entity_category: ");
+  out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -2902,6 +2977,10 @@ bool ListEntitiesCameraResponse::decode_varint(uint32_t field_id, ProtoVarInt va
       this->disabled_by_default = value.as_bool();
       return true;
     }
+    case 7: {
+      this->entity_category = value.as_enum<enums::EntityCategory>();
+      return true;
+    }
     default:
       return false;
   }
@@ -2945,6 +3024,7 @@ void ListEntitiesCameraResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_string(4, this->unique_id);
   buffer.encode_bool(5, this->disabled_by_default);
   buffer.encode_string(6, this->icon);
+  buffer.encode_enum<enums::EntityCategory>(7, this->entity_category);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesCameraResponse::dump_to(std::string &out) const {
@@ -2974,6 +3054,10 @@ void ListEntitiesCameraResponse::dump_to(std::string &out) const {
   out.append("  icon: ");
   out.append("'").append(this->icon).append("'");
   out.append("\n");
+
+  out.append("  entity_category: ");
+  out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -3101,6 +3185,10 @@ bool ListEntitiesClimateResponse::decode_varint(uint32_t field_id, ProtoVarInt v
       this->disabled_by_default = value.as_bool();
       return true;
     }
+    case 20: {
+      this->entity_category = value.as_enum<enums::EntityCategory>();
+      return true;
+    }
     default:
       return false;
   }
@@ -3189,6 +3277,7 @@ void ListEntitiesClimateResponse::encode(ProtoWriteBuffer buffer) const {
   }
   buffer.encode_bool(18, this->disabled_by_default);
   buffer.encode_string(19, this->icon);
+  buffer.encode_enum<enums::EntityCategory>(20, this->entity_category);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesClimateResponse::dump_to(std::string &out) const {
@@ -3285,6 +3374,10 @@ void ListEntitiesClimateResponse::dump_to(std::string &out) const {
   out.append("  icon: ");
   out.append("'").append(this->icon).append("'");
   out.append("\n");
+
+  out.append("  entity_category: ");
+  out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -3661,6 +3754,10 @@ bool ListEntitiesNumberResponse::decode_varint(uint32_t field_id, ProtoVarInt va
       this->disabled_by_default = value.as_bool();
       return true;
     }
+    case 10: {
+      this->entity_category = value.as_enum<enums::EntityCategory>();
+      return true;
+    }
     default:
       return false;
   }
@@ -3719,6 +3816,7 @@ void ListEntitiesNumberResponse::encode(ProtoWriteBuffer buffer) const {
   buffer.encode_float(7, this->max_value);
   buffer.encode_float(8, this->step);
   buffer.encode_bool(9, this->disabled_by_default);
+  buffer.encode_enum<enums::EntityCategory>(10, this->entity_category);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesNumberResponse::dump_to(std::string &out) const {
@@ -3763,6 +3861,10 @@ void ListEntitiesNumberResponse::dump_to(std::string &out) const {
   out.append("  disabled_by_default: ");
   out.append(YESNO(this->disabled_by_default));
   out.append("\n");
+
+  out.append("  entity_category: ");
+  out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
+  out.append("\n");
   out.append("}");
 }
 #endif
@@ -3855,6 +3957,10 @@ bool ListEntitiesSelectResponse::decode_varint(uint32_t field_id, ProtoVarInt va
       this->disabled_by_default = value.as_bool();
       return true;
     }
+    case 8: {
+      this->entity_category = value.as_enum<enums::EntityCategory>();
+      return true;
+    }
     default:
       return false;
   }
@@ -3905,6 +4011,7 @@ void ListEntitiesSelectResponse::encode(ProtoWriteBuffer buffer) const {
     buffer.encode_string(6, it, true);
   }
   buffer.encode_bool(7, this->disabled_by_default);
+  buffer.encode_enum<enums::EntityCategory>(8, this->entity_category);
 }
 #ifdef HAS_PROTO_MESSAGE_DUMP
 void ListEntitiesSelectResponse::dump_to(std::string &out) const {
@@ -3940,6 +4047,10 @@ void ListEntitiesSelectResponse::dump_to(std::string &out) const {
   out.append("  disabled_by_default: ");
   out.append(YESNO(this->disabled_by_default));
   out.append("\n");
+
+  out.append("  entity_category: ");
+  out.append(proto_enum_to_string<enums::EntityCategory>(this->entity_category));
+  out.append("\n");
   out.append("}");
 }
 #endif
diff --git a/esphome/components/api/api_pb2.h b/esphome/components/api/api_pb2.h
index af85ed6856..ec11732c7d 100644
--- a/esphome/components/api/api_pb2.h
+++ b/esphome/components/api/api_pb2.h
@@ -9,6 +9,11 @@ namespace api {
 
 namespace enums {
 
+enum EntityCategory : uint32_t {
+  ENTITY_CATEGORY_NONE = 0,
+  ENTITY_CATEGORY_CONFIG = 1,
+  ENTITY_CATEGORY_DIAGNOSTIC = 2,
+};
 enum LegacyCoverState : uint32_t {
   LEGACY_COVER_STATE_OPEN = 0,
   LEGACY_COVER_STATE_CLOSED = 1,
@@ -271,6 +276,7 @@ class ListEntitiesBinarySensorResponse : public ProtoMessage {
   bool is_status_binary_sensor{false};
   bool disabled_by_default{false};
   std::string icon{};
+  enums::EntityCategory entity_category{};
   void encode(ProtoWriteBuffer buffer) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   void dump_to(std::string &out) const override;
@@ -307,6 +313,7 @@ class ListEntitiesCoverResponse : public ProtoMessage {
   std::string device_class{};
   bool disabled_by_default{false};
   std::string icon{};
+  enums::EntityCategory entity_category{};
   void encode(ProtoWriteBuffer buffer) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   void dump_to(std::string &out) const override;
@@ -364,6 +371,7 @@ class ListEntitiesFanResponse : public ProtoMessage {
   int32_t supported_speed_count{0};
   bool disabled_by_default{false};
   std::string icon{};
+  enums::EntityCategory entity_category{};
   void encode(ProtoWriteBuffer buffer) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   void dump_to(std::string &out) const override;
@@ -429,6 +437,7 @@ class ListEntitiesLightResponse : public ProtoMessage {
   std::vector<std::string> effects{};
   bool disabled_by_default{false};
   std::string icon{};
+  enums::EntityCategory entity_category{};
   void encode(ProtoWriteBuffer buffer) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   void dump_to(std::string &out) const override;
@@ -517,6 +526,7 @@ class ListEntitiesSensorResponse : public ProtoMessage {
   enums::SensorStateClass state_class{};
   enums::SensorLastResetType legacy_last_reset_type{};
   bool disabled_by_default{false};
+  enums::EntityCategory entity_category{};
   void encode(ProtoWriteBuffer buffer) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   void dump_to(std::string &out) const override;
@@ -550,6 +560,7 @@ class ListEntitiesSwitchResponse : public ProtoMessage {
   std::string icon{};
   bool assumed_state{false};
   bool disabled_by_default{false};
+  enums::EntityCategory entity_category{};
   void encode(ProtoWriteBuffer buffer) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   void dump_to(std::string &out) const override;
@@ -594,6 +605,7 @@ class ListEntitiesTextSensorResponse : public ProtoMessage {
   std::string unique_id{};
   std::string icon{};
   bool disabled_by_default{false};
+  enums::EntityCategory entity_category{};
   void encode(ProtoWriteBuffer buffer) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   void dump_to(std::string &out) const override;
@@ -805,6 +817,7 @@ class ListEntitiesCameraResponse : public ProtoMessage {
   std::string unique_id{};
   bool disabled_by_default{false};
   std::string icon{};
+  enums::EntityCategory entity_category{};
   void encode(ProtoWriteBuffer buffer) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   void dump_to(std::string &out) const override;
@@ -863,6 +876,7 @@ class ListEntitiesClimateResponse : public ProtoMessage {
   std::vector<std::string> supported_custom_presets{};
   bool disabled_by_default{false};
   std::string icon{};
+  enums::EntityCategory entity_category{};
   void encode(ProtoWriteBuffer buffer) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   void dump_to(std::string &out) const override;
@@ -942,6 +956,7 @@ class ListEntitiesNumberResponse : public ProtoMessage {
   float max_value{0.0f};
   float step{0.0f};
   bool disabled_by_default{false};
+  enums::EntityCategory entity_category{};
   void encode(ProtoWriteBuffer buffer) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   void dump_to(std::string &out) const override;
@@ -987,6 +1002,7 @@ class ListEntitiesSelectResponse : public ProtoMessage {
   std::string icon{};
   std::vector<std::string> options{};
   bool disabled_by_default{false};
+  enums::EntityCategory entity_category{};
   void encode(ProtoWriteBuffer buffer) const override;
 #ifdef HAS_PROTO_MESSAGE_DUMP
   void dump_to(std::string &out) const override;
diff --git a/esphome/components/atc_mithermometer/sensor.py b/esphome/components/atc_mithermometer/sensor.py
index 0f6cc1abcb..bde83c28b6 100644
--- a/esphome/components/atc_mithermometer/sensor.py
+++ b/esphome/components/atc_mithermometer/sensor.py
@@ -12,6 +12,7 @@ from esphome.const import (
     DEVICE_CLASS_HUMIDITY,
     DEVICE_CLASS_TEMPERATURE,
     DEVICE_CLASS_VOLTAGE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
     UNIT_PERCENT,
@@ -49,12 +50,14 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_BATTERY,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
             cv.Optional(CONF_BATTERY_VOLTAGE): sensor.sensor_schema(
                 unit_of_measurement=UNIT_VOLT,
                 accuracy_decimals=3,
                 device_class=DEVICE_CLASS_VOLTAGE,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
         }
     )
diff --git a/esphome/components/atm90e32/sensor.py b/esphome/components/atm90e32/sensor.py
index 05e5250d89..9c876bb62c 100644
--- a/esphome/components/atm90e32/sensor.py
+++ b/esphome/components/atm90e32/sensor.py
@@ -17,6 +17,7 @@ from esphome.const import (
     DEVICE_CLASS_POWER_FACTOR,
     DEVICE_CLASS_TEMPERATURE,
     DEVICE_CLASS_VOLTAGE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     ICON_LIGHTBULB,
     ICON_CURRENT_AC,
     STATE_CLASS_MEASUREMENT,
@@ -125,6 +126,7 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=1,
                 device_class=DEVICE_CLASS_TEMPERATURE,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
             cv.Required(CONF_LINE_FREQUENCY): cv.enum(LINE_FREQS, upper=True),
             cv.Optional(CONF_CURRENT_PHASES, default="3"): cv.enum(
diff --git a/esphome/components/b_parasite/sensor.py b/esphome/components/b_parasite/sensor.py
index d51c48c602..201685adc4 100644
--- a/esphome/components/b_parasite/sensor.py
+++ b/esphome/components/b_parasite/sensor.py
@@ -13,6 +13,7 @@ from esphome.const import (
     DEVICE_CLASS_ILLUMINANCE,
     DEVICE_CLASS_TEMPERATURE,
     DEVICE_CLASS_VOLTAGE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
     UNIT_LUX,
@@ -51,6 +52,7 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=3,
                 device_class=DEVICE_CLASS_VOLTAGE,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
             cv.Optional(CONF_MOISTURE): sensor.sensor_schema(
                 unit_of_measurement=UNIT_PERCENT,
diff --git a/esphome/components/binary_sensor/__init__.py b/esphome/components/binary_sensor/__init__.py
index ec199cc5fa..faafcddd06 100644
--- a/esphome/components/binary_sensor/__init__.py
+++ b/esphome/components/binary_sensor/__init__.py
@@ -313,6 +313,7 @@ def validate_multi_click_timing(value):
 
 device_class = cv.one_of(*DEVICE_CLASSES, lower=True, space="_")
 
+
 BINARY_SENSOR_SCHEMA = cv.ENTITY_BASE_SCHEMA.extend(cv.MQTT_COMPONENT_SCHEMA).extend(
     {
         cv.GenerateID(): cv.declare_id(BinarySensor),
diff --git a/esphome/components/fingerprint_grow/sensor.py b/esphome/components/fingerprint_grow/sensor.py
index f359a10348..4ae670743d 100644
--- a/esphome/components/fingerprint_grow/sensor.py
+++ b/esphome/components/fingerprint_grow/sensor.py
@@ -8,6 +8,7 @@ from esphome.const import (
     CONF_LAST_FINGER_ID,
     CONF_SECURITY_LEVEL,
     CONF_STATUS,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     ICON_ACCOUNT,
     ICON_ACCOUNT_CHECK,
     ICON_DATABASE,
@@ -26,30 +27,36 @@ CONFIG_SCHEMA = cv.Schema(
             icon=ICON_FINGERPRINT,
             accuracy_decimals=0,
             state_class=STATE_CLASS_NONE,
+            entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
         ),
         cv.Optional(CONF_STATUS): sensor.sensor_schema(
             accuracy_decimals=0,
             state_class=STATE_CLASS_NONE,
+            entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
         ),
         cv.Optional(CONF_CAPACITY): sensor.sensor_schema(
             icon=ICON_DATABASE,
             accuracy_decimals=0,
             state_class=STATE_CLASS_NONE,
+            entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
         ),
         cv.Optional(CONF_SECURITY_LEVEL): sensor.sensor_schema(
             icon=ICON_SECURITY,
             accuracy_decimals=0,
             state_class=STATE_CLASS_NONE,
+            entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
         ),
         cv.Optional(CONF_LAST_FINGER_ID): sensor.sensor_schema(
             icon=ICON_ACCOUNT,
             accuracy_decimals=0,
             state_class=STATE_CLASS_NONE,
+            entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
         ),
         cv.Optional(CONF_LAST_CONFIDENCE): sensor.sensor_schema(
             icon=ICON_ACCOUNT_CHECK,
             accuracy_decimals=0,
             state_class=STATE_CLASS_NONE,
+            entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
         ),
     }
 )
diff --git a/esphome/components/inkbird_ibsth1_mini/sensor.py b/esphome/components/inkbird_ibsth1_mini/sensor.py
index 0ab9f8b3e0..aa11fb3172 100644
--- a/esphome/components/inkbird_ibsth1_mini/sensor.py
+++ b/esphome/components/inkbird_ibsth1_mini/sensor.py
@@ -9,6 +9,7 @@ from esphome.const import (
     DEVICE_CLASS_BATTERY,
     DEVICE_CLASS_HUMIDITY,
     DEVICE_CLASS_TEMPERATURE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
     UNIT_PERCENT,
@@ -53,6 +54,7 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_BATTERY,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
         }
     )
diff --git a/esphome/components/number/__init__.py b/esphome/components/number/__init__.py
index 2856a25ee7..bb3427e4bd 100644
--- a/esphome/components/number/__init__.py
+++ b/esphome/components/number/__init__.py
@@ -41,7 +41,6 @@ NumberInRangeCondition = number_ns.class_(
 
 icon = cv.icon
 
-
 NUMBER_SCHEMA = cv.ENTITY_BASE_SCHEMA.extend(cv.MQTT_COMPONENT_SCHEMA).extend(
     {
         cv.OnlyWith(CONF_MQTT_ID, "mqtt"): cv.declare_id(mqtt.MQTTNumberComponent),
diff --git a/esphome/components/pvvx_mithermometer/sensor.py b/esphome/components/pvvx_mithermometer/sensor.py
index b17878f01b..12090bddba 100644
--- a/esphome/components/pvvx_mithermometer/sensor.py
+++ b/esphome/components/pvvx_mithermometer/sensor.py
@@ -12,6 +12,7 @@ from esphome.const import (
     DEVICE_CLASS_HUMIDITY,
     DEVICE_CLASS_TEMPERATURE,
     DEVICE_CLASS_VOLTAGE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
     UNIT_PERCENT,
@@ -49,12 +50,14 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_BATTERY,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
             cv.Optional(CONF_BATTERY_VOLTAGE): sensor.sensor_schema(
                 unit_of_measurement=UNIT_VOLT,
                 accuracy_decimals=3,
                 device_class=DEVICE_CLASS_VOLTAGE,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
         }
     )
diff --git a/esphome/components/restart/switch.py b/esphome/components/restart/switch.py
index 4f1904e273..de30392b45 100644
--- a/esphome/components/restart/switch.py
+++ b/esphome/components/restart/switch.py
@@ -1,7 +1,14 @@
 import esphome.codegen as cg
 import esphome.config_validation as cv
 from esphome.components import switch
-from esphome.const import CONF_ID, CONF_INVERTED, CONF_ICON, ICON_RESTART
+from esphome.const import (
+    CONF_ENTITY_CATEGORY,
+    CONF_ID,
+    CONF_INVERTED,
+    CONF_ICON,
+    ENTITY_CATEGORY_CONFIG,
+    ICON_RESTART,
+)
 
 restart_ns = cg.esphome_ns.namespace("restart")
 RestartSwitch = restart_ns.class_("RestartSwitch", switch.Switch, cg.Component)
@@ -13,6 +20,9 @@ CONFIG_SCHEMA = switch.SWITCH_SCHEMA.extend(
             "Restart switches do not support inverted mode!"
         ),
         cv.Optional(CONF_ICON, default=ICON_RESTART): switch.icon,
+        cv.Optional(
+            CONF_ENTITY_CATEGORY, default=ENTITY_CATEGORY_CONFIG
+        ): cv.entity_category,
     }
 ).extend(cv.COMPONENT_SCHEMA)
 
diff --git a/esphome/components/ruuvitag/sensor.py b/esphome/components/ruuvitag/sensor.py
index 342a5eff24..2bb9549195 100644
--- a/esphome/components/ruuvitag/sensor.py
+++ b/esphome/components/ruuvitag/sensor.py
@@ -19,6 +19,7 @@ from esphome.const import (
     DEVICE_CLASS_SIGNAL_STRENGTH,
     DEVICE_CLASS_TEMPERATURE,
     DEVICE_CLASS_VOLTAGE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     STATE_CLASS_NONE,
     UNIT_CELSIUS,
@@ -95,22 +96,26 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=3,
                 device_class=DEVICE_CLASS_VOLTAGE,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
             cv.Optional(CONF_TX_POWER): sensor.sensor_schema(
                 unit_of_measurement=UNIT_DECIBEL_MILLIWATT,
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_SIGNAL_STRENGTH,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
             cv.Optional(CONF_MOVEMENT_COUNTER): sensor.sensor_schema(
                 icon=ICON_GAUGE,
                 accuracy_decimals=0,
                 state_class=STATE_CLASS_NONE,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
             cv.Optional(CONF_MEASUREMENT_SEQUENCE_NUMBER): sensor.sensor_schema(
                 icon=ICON_GAUGE,
                 accuracy_decimals=0,
                 state_class=STATE_CLASS_NONE,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
         }
     )
diff --git a/esphome/components/safe_mode/switch/__init__.py b/esphome/components/safe_mode/switch/__init__.py
index 0ad814ff4f..b6c3e852f6 100644
--- a/esphome/components/safe_mode/switch/__init__.py
+++ b/esphome/components/safe_mode/switch/__init__.py
@@ -3,10 +3,12 @@ import esphome.config_validation as cv
 from esphome.components import switch
 from esphome.components.ota import OTAComponent
 from esphome.const import (
+    CONF_ENTITY_CATEGORY,
     CONF_ID,
     CONF_INVERTED,
     CONF_ICON,
     CONF_OTA,
+    ENTITY_CATEGORY_CONFIG,
     ICON_RESTART_ALERT,
 )
 from .. import safe_mode_ns
@@ -23,6 +25,9 @@ CONFIG_SCHEMA = switch.SWITCH_SCHEMA.extend(
             "Safe Mode Restart switches do not support inverted mode!"
         ),
         cv.Optional(CONF_ICON, default=ICON_RESTART_ALERT): switch.icon,
+        cv.Optional(
+            CONF_ENTITY_CATEGORY, default=ENTITY_CATEGORY_CONFIG
+        ): cv.entity_category,
     }
 ).extend(cv.COMPONENT_SCHEMA)
 
diff --git a/esphome/components/select/__init__.py b/esphome/components/select/__init__.py
index 7e4047d3c8..8ea159d657 100644
--- a/esphome/components/select/__init__.py
+++ b/esphome/components/select/__init__.py
@@ -30,7 +30,6 @@ SelectSetAction = select_ns.class_("SelectSetAction", automation.Action)
 
 icon = cv.icon
 
-
 SELECT_SCHEMA = cv.ENTITY_BASE_SCHEMA.extend(cv.MQTT_COMPONENT_SCHEMA).extend(
     {
         cv.OnlyWith(CONF_MQTT_ID, "mqtt"): cv.declare_id(mqtt.MQTTSelectComponent),
diff --git a/esphome/components/sensor/__init__.py b/esphome/components/sensor/__init__.py
index 4b2e9dc019..d9d226aab6 100644
--- a/esphome/components/sensor/__init__.py
+++ b/esphome/components/sensor/__init__.py
@@ -10,6 +10,7 @@ from esphome.const import (
     CONF_ACCURACY_DECIMALS,
     CONF_ALPHA,
     CONF_BELOW,
+    CONF_ENTITY_CATEGORY,
     CONF_EXPIRE_AFTER,
     CONF_FILTERS,
     CONF_FROM,
@@ -133,7 +134,6 @@ def validate_datapoint(value):
 
 
 # Base
-sensor_ns = cg.esphome_ns.namespace("sensor")
 Sensor = sensor_ns.class_("Sensor", cg.EntityBase)
 SensorPtr = Sensor.operator("ptr")
 
@@ -226,6 +226,7 @@ def sensor_schema(
     accuracy_decimals: int = _UNDEF,
     device_class: str = _UNDEF,
     state_class: str = _UNDEF,
+    entity_category: str = _UNDEF,
 ) -> cv.Schema:
     schema = SENSOR_SCHEMA
     if unit_of_measurement is not _UNDEF:
@@ -258,6 +259,14 @@ def sensor_schema(
         schema = schema.extend(
             {cv.Optional(CONF_STATE_CLASS, default=state_class): validate_state_class}
         )
+    if entity_category is not _UNDEF:
+        schema = schema.extend(
+            {
+                cv.Optional(
+                    CONF_ENTITY_CATEGORY, default=entity_category
+                ): cv.entity_category
+            }
+        )
     return schema
 
 
diff --git a/esphome/components/shutdown/switch.py b/esphome/components/shutdown/switch.py
index 30c2bc2b74..49970b4c2f 100644
--- a/esphome/components/shutdown/switch.py
+++ b/esphome/components/shutdown/switch.py
@@ -1,7 +1,14 @@
 import esphome.codegen as cg
 import esphome.config_validation as cv
 from esphome.components import switch
-from esphome.const import CONF_ID, CONF_INVERTED, CONF_ICON, ICON_POWER
+from esphome.const import (
+    CONF_ENTITY_CATEGORY,
+    CONF_ID,
+    CONF_INVERTED,
+    CONF_ICON,
+    ENTITY_CATEGORY_CONFIG,
+    ICON_POWER,
+)
 
 shutdown_ns = cg.esphome_ns.namespace("shutdown")
 ShutdownSwitch = shutdown_ns.class_("ShutdownSwitch", switch.Switch, cg.Component)
@@ -13,6 +20,9 @@ CONFIG_SCHEMA = switch.SWITCH_SCHEMA.extend(
             "Shutdown switches do not support inverted mode!"
         ),
         cv.Optional(CONF_ICON, default=ICON_POWER): switch.icon,
+        cv.Optional(
+            CONF_ENTITY_CATEGORY, default=ENTITY_CATEGORY_CONFIG
+        ): cv.entity_category,
     }
 ).extend(cv.COMPONENT_SCHEMA)
 
diff --git a/esphome/components/status/binary_sensor.py b/esphome/components/status/binary_sensor.py
index e462bc5385..9367706388 100644
--- a/esphome/components/status/binary_sensor.py
+++ b/esphome/components/status/binary_sensor.py
@@ -1,7 +1,13 @@
 import esphome.codegen as cg
 import esphome.config_validation as cv
 from esphome.components import binary_sensor
-from esphome.const import CONF_ID, CONF_DEVICE_CLASS, DEVICE_CLASS_CONNECTIVITY
+from esphome.const import (
+    CONF_ENTITY_CATEGORY,
+    CONF_ID,
+    CONF_DEVICE_CLASS,
+    DEVICE_CLASS_CONNECTIVITY,
+    ENTITY_CATEGORY_DIAGNOSTIC,
+)
 
 status_ns = cg.esphome_ns.namespace("status")
 StatusBinarySensor = status_ns.class_(
@@ -14,6 +20,9 @@ CONFIG_SCHEMA = binary_sensor.BINARY_SENSOR_SCHEMA.extend(
         cv.Optional(
             CONF_DEVICE_CLASS, default=DEVICE_CLASS_CONNECTIVITY
         ): binary_sensor.device_class,
+        cv.Optional(
+            CONF_ENTITY_CATEGORY, default=ENTITY_CATEGORY_DIAGNOSTIC
+        ): cv.entity_category,
     }
 ).extend(cv.COMPONENT_SCHEMA)
 
diff --git a/esphome/components/switch/__init__.py b/esphome/components/switch/__init__.py
index 88341e0add..08cbccbe35 100644
--- a/esphome/components/switch/__init__.py
+++ b/esphome/components/switch/__init__.py
@@ -36,6 +36,7 @@ SwitchTurnOffTrigger = switch_ns.class_(
 
 icon = cv.icon
 
+
 SWITCH_SCHEMA = cv.ENTITY_BASE_SCHEMA.extend(cv.MQTT_COMMAND_COMPONENT_SCHEMA).extend(
     {
         cv.OnlyWith(CONF_MQTT_ID, "mqtt"): cv.declare_id(mqtt.MQTTSwitchComponent),
diff --git a/esphome/components/text_sensor/__init__.py b/esphome/components/text_sensor/__init__.py
index 5c739e1d0a..a070e6f86d 100644
--- a/esphome/components/text_sensor/__init__.py
+++ b/esphome/components/text_sensor/__init__.py
@@ -108,6 +108,7 @@ async def substitute_filter_to_code(config, filter_id):
 
 icon = cv.icon
 
+
 TEXT_SENSOR_SCHEMA = cv.ENTITY_BASE_SCHEMA.extend(cv.MQTT_COMPONENT_SCHEMA).extend(
     {
         cv.OnlyWith(CONF_MQTT_ID, "mqtt"): cv.declare_id(mqtt.MQTTTextSensor),
diff --git a/esphome/components/uptime/sensor.py b/esphome/components/uptime/sensor.py
index 7989f3befc..16a1e4c125 100644
--- a/esphome/components/uptime/sensor.py
+++ b/esphome/components/uptime/sensor.py
@@ -3,6 +3,7 @@ import esphome.config_validation as cv
 from esphome.components import sensor
 from esphome.const import (
     CONF_ID,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_TOTAL_INCREASING,
     UNIT_SECOND,
     ICON_TIMER,
@@ -17,6 +18,7 @@ CONFIG_SCHEMA = (
         icon=ICON_TIMER,
         accuracy_decimals=0,
         state_class=STATE_CLASS_TOTAL_INCREASING,
+        entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
     )
     .extend(
         {
diff --git a/esphome/components/version/text_sensor.py b/esphome/components/version/text_sensor.py
index e67f881d32..4835caf35b 100644
--- a/esphome/components/version/text_sensor.py
+++ b/esphome/components/version/text_sensor.py
@@ -1,7 +1,14 @@
 import esphome.codegen as cg
 import esphome.config_validation as cv
 from esphome.components import text_sensor
-from esphome.const import CONF_ID, CONF_ICON, ICON_NEW_BOX, CONF_HIDE_TIMESTAMP
+from esphome.const import (
+    CONF_ENTITY_CATEGORY,
+    CONF_ID,
+    CONF_ICON,
+    ENTITY_CATEGORY_DIAGNOSTIC,
+    ICON_NEW_BOX,
+    CONF_HIDE_TIMESTAMP,
+)
 
 version_ns = cg.esphome_ns.namespace("version")
 VersionTextSensor = version_ns.class_(
@@ -13,6 +20,9 @@ CONFIG_SCHEMA = text_sensor.TEXT_SENSOR_SCHEMA.extend(
         cv.GenerateID(): cv.declare_id(VersionTextSensor),
         cv.Optional(CONF_ICON, default=ICON_NEW_BOX): text_sensor.icon,
         cv.Optional(CONF_HIDE_TIMESTAMP, default=False): cv.boolean,
+        cv.Optional(
+            CONF_ENTITY_CATEGORY, default=ENTITY_CATEGORY_DIAGNOSTIC
+        ): cv.entity_category,
     }
 ).extend(cv.COMPONENT_SCHEMA)
 
diff --git a/esphome/components/wifi_info/text_sensor.py b/esphome/components/wifi_info/text_sensor.py
index 1922502204..706a8967be 100644
--- a/esphome/components/wifi_info/text_sensor.py
+++ b/esphome/components/wifi_info/text_sensor.py
@@ -3,11 +3,13 @@ import esphome.config_validation as cv
 from esphome.components import text_sensor
 from esphome.const import (
     CONF_BSSID,
+    CONF_ENTITY_CATEGORY,
     CONF_ID,
     CONF_IP_ADDRESS,
     CONF_SCAN_RESULTS,
     CONF_SSID,
     CONF_MAC_ADDRESS,
+    ENTITY_CATEGORY_DIAGNOSTIC,
 )
 
 DEPENDENCIES = ["wifi"]
@@ -32,26 +34,41 @@ CONFIG_SCHEMA = cv.Schema(
         cv.Optional(CONF_IP_ADDRESS): text_sensor.TEXT_SENSOR_SCHEMA.extend(
             {
                 cv.GenerateID(): cv.declare_id(IPAddressWiFiInfo),
+                cv.Optional(
+                    CONF_ENTITY_CATEGORY, default=ENTITY_CATEGORY_DIAGNOSTIC
+                ): cv.entity_category,
             }
         ),
         cv.Optional(CONF_SCAN_RESULTS): text_sensor.TEXT_SENSOR_SCHEMA.extend(
             {
                 cv.GenerateID(): cv.declare_id(ScanResultsWiFiInfo),
+                cv.Optional(
+                    CONF_ENTITY_CATEGORY, default=ENTITY_CATEGORY_DIAGNOSTIC
+                ): cv.entity_category,
             }
         ).extend(cv.polling_component_schema("60s")),
         cv.Optional(CONF_SSID): text_sensor.TEXT_SENSOR_SCHEMA.extend(
             {
                 cv.GenerateID(): cv.declare_id(SSIDWiFiInfo),
+                cv.Optional(
+                    CONF_ENTITY_CATEGORY, default=ENTITY_CATEGORY_DIAGNOSTIC
+                ): cv.entity_category,
             }
         ),
         cv.Optional(CONF_BSSID): text_sensor.TEXT_SENSOR_SCHEMA.extend(
             {
                 cv.GenerateID(): cv.declare_id(BSSIDWiFiInfo),
+                cv.Optional(
+                    CONF_ENTITY_CATEGORY, default=ENTITY_CATEGORY_DIAGNOSTIC
+                ): cv.entity_category,
             }
         ),
         cv.Optional(CONF_MAC_ADDRESS): text_sensor.TEXT_SENSOR_SCHEMA.extend(
             {
                 cv.GenerateID(): cv.declare_id(MacAddressWifiInfo),
+                cv.Optional(
+                    CONF_ENTITY_CATEGORY, default=ENTITY_CATEGORY_DIAGNOSTIC
+                ): cv.entity_category,
             }
         ),
     }
diff --git a/esphome/components/wifi_signal/sensor.py b/esphome/components/wifi_signal/sensor.py
index 37bee75928..2097c21bd7 100644
--- a/esphome/components/wifi_signal/sensor.py
+++ b/esphome/components/wifi_signal/sensor.py
@@ -4,6 +4,7 @@ from esphome.components import sensor
 from esphome.const import (
     CONF_ID,
     DEVICE_CLASS_SIGNAL_STRENGTH,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_DECIBEL_MILLIWATT,
 )
@@ -20,6 +21,7 @@ CONFIG_SCHEMA = (
         accuracy_decimals=0,
         device_class=DEVICE_CLASS_SIGNAL_STRENGTH,
         state_class=STATE_CLASS_MEASUREMENT,
+        entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
     )
     .extend(
         {
diff --git a/esphome/components/xiaomi_cgd1/sensor.py b/esphome/components/xiaomi_cgd1/sensor.py
index 774c87fee9..5b88121d7c 100644
--- a/esphome/components/xiaomi_cgd1/sensor.py
+++ b/esphome/components/xiaomi_cgd1/sensor.py
@@ -10,6 +10,7 @@ from esphome.const import (
     DEVICE_CLASS_BATTERY,
     DEVICE_CLASS_HUMIDITY,
     DEVICE_CLASS_TEMPERATURE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
     UNIT_PERCENT,
@@ -47,6 +48,7 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_BATTERY,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
         }
     )
diff --git a/esphome/components/xiaomi_cgdk2/sensor.py b/esphome/components/xiaomi_cgdk2/sensor.py
index d4e7230fd0..ac487d87fc 100644
--- a/esphome/components/xiaomi_cgdk2/sensor.py
+++ b/esphome/components/xiaomi_cgdk2/sensor.py
@@ -9,6 +9,7 @@ from esphome.const import (
     DEVICE_CLASS_BATTERY,
     DEVICE_CLASS_HUMIDITY,
     DEVICE_CLASS_TEMPERATURE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
     UNIT_PERCENT,
@@ -47,6 +48,7 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_BATTERY,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
         }
     )
diff --git a/esphome/components/xiaomi_cgg1/sensor.py b/esphome/components/xiaomi_cgg1/sensor.py
index 4e606d95f8..a4f9a39aff 100644
--- a/esphome/components/xiaomi_cgg1/sensor.py
+++ b/esphome/components/xiaomi_cgg1/sensor.py
@@ -11,6 +11,7 @@ from esphome.const import (
     DEVICE_CLASS_BATTERY,
     DEVICE_CLASS_HUMIDITY,
     DEVICE_CLASS_TEMPERATURE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
     UNIT_PERCENT,
@@ -47,6 +48,7 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_BATTERY,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
         }
     )
diff --git a/esphome/components/xiaomi_cgpr1/binary_sensor.py b/esphome/components/xiaomi_cgpr1/binary_sensor.py
index a7f6c41225..7f0aac873d 100644
--- a/esphome/components/xiaomi_cgpr1/binary_sensor.py
+++ b/esphome/components/xiaomi_cgpr1/binary_sensor.py
@@ -10,6 +10,8 @@ from esphome.const import (
     DEVICE_CLASS_EMPTY,
     DEVICE_CLASS_BATTERY,
     DEVICE_CLASS_ILLUMINANCE,
+    DEVICE_CLASS_MOTION,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     ICON_EMPTY,
     UNIT_PERCENT,
     CONF_IDLE_TIME,
@@ -37,13 +39,21 @@ CONFIG_SCHEMA = cv.All(
             cv.Required(CONF_BINDKEY): cv.bind_key,
             cv.Required(CONF_MAC_ADDRESS): cv.mac_address,
             cv.Optional(
-                CONF_DEVICE_CLASS, default="motion"
+                CONF_DEVICE_CLASS,
+                default=DEVICE_CLASS_MOTION,
             ): binary_sensor.device_class,
             cv.Optional(CONF_BATTERY_LEVEL): sensor.sensor_schema(
-                UNIT_PERCENT, ICON_EMPTY, 0, DEVICE_CLASS_BATTERY
+                unit_of_measurement=UNIT_PERCENT,
+                accuracy_decimals=0,
+                device_class=DEVICE_CLASS_BATTERY,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
             cv.Optional(CONF_IDLE_TIME): sensor.sensor_schema(
-                UNIT_MINUTE, ICON_TIMELAPSE, 0, DEVICE_CLASS_EMPTY
+                unit_of_measurement=UNIT_MINUTE,
+                icon=ICON_TIMELAPSE,
+                accuracy_decimals=0,
+                device_class=DEVICE_CLASS_EMPTY,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
             cv.Optional(CONF_ILLUMINANCE): sensor.sensor_schema(
                 UNIT_LUX, ICON_EMPTY, 0, DEVICE_CLASS_ILLUMINANCE
diff --git a/esphome/components/xiaomi_hhccjcy01/sensor.py b/esphome/components/xiaomi_hhccjcy01/sensor.py
index 1818731a0f..535316e246 100644
--- a/esphome/components/xiaomi_hhccjcy01/sensor.py
+++ b/esphome/components/xiaomi_hhccjcy01/sensor.py
@@ -6,6 +6,7 @@ from esphome.const import (
     CONF_TEMPERATURE,
     DEVICE_CLASS_ILLUMINANCE,
     DEVICE_CLASS_TEMPERATURE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     ICON_WATER_PERCENT,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
@@ -63,6 +64,7 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_BATTERY,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
         }
     )
diff --git a/esphome/components/xiaomi_jqjcy01ym/sensor.py b/esphome/components/xiaomi_jqjcy01ym/sensor.py
index 40991c3d0f..f4d2b342fd 100644
--- a/esphome/components/xiaomi_jqjcy01ym/sensor.py
+++ b/esphome/components/xiaomi_jqjcy01ym/sensor.py
@@ -9,6 +9,7 @@ from esphome.const import (
     DEVICE_CLASS_BATTERY,
     DEVICE_CLASS_HUMIDITY,
     DEVICE_CLASS_TEMPERATURE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
     UNIT_PERCENT,
@@ -54,6 +55,7 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_BATTERY,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
         }
     )
diff --git a/esphome/components/xiaomi_lywsd02/sensor.py b/esphome/components/xiaomi_lywsd02/sensor.py
index 339c5e673a..20629a0a9c 100644
--- a/esphome/components/xiaomi_lywsd02/sensor.py
+++ b/esphome/components/xiaomi_lywsd02/sensor.py
@@ -7,6 +7,7 @@ from esphome.const import (
     CONF_MAC_ADDRESS,
     CONF_TEMPERATURE,
     DEVICE_CLASS_TEMPERATURE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
     UNIT_PERCENT,
@@ -45,6 +46,7 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_BATTERY,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
         }
     )
diff --git a/esphome/components/xiaomi_lywsd03mmc/sensor.py b/esphome/components/xiaomi_lywsd03mmc/sensor.py
index f27cee3800..b2784e58fc 100644
--- a/esphome/components/xiaomi_lywsd03mmc/sensor.py
+++ b/esphome/components/xiaomi_lywsd03mmc/sensor.py
@@ -6,6 +6,7 @@ from esphome.const import (
     CONF_HUMIDITY,
     CONF_MAC_ADDRESS,
     CONF_TEMPERATURE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
     UNIT_PERCENT,
@@ -49,6 +50,7 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_BATTERY,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
         }
     )
diff --git a/esphome/components/xiaomi_lywsdcgq/sensor.py b/esphome/components/xiaomi_lywsdcgq/sensor.py
index 39a207327e..80f24ac0ef 100644
--- a/esphome/components/xiaomi_lywsdcgq/sensor.py
+++ b/esphome/components/xiaomi_lywsdcgq/sensor.py
@@ -6,6 +6,7 @@ from esphome.const import (
     CONF_HUMIDITY,
     CONF_MAC_ADDRESS,
     CONF_TEMPERATURE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
     UNIT_PERCENT,
@@ -45,6 +46,7 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_BATTERY,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
         }
     )
diff --git a/esphome/components/xiaomi_mhoc401/sensor.py b/esphome/components/xiaomi_mhoc401/sensor.py
index 57b2190150..9e92e34230 100644
--- a/esphome/components/xiaomi_mhoc401/sensor.py
+++ b/esphome/components/xiaomi_mhoc401/sensor.py
@@ -6,6 +6,7 @@ from esphome.const import (
     CONF_HUMIDITY,
     CONF_MAC_ADDRESS,
     CONF_TEMPERATURE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_CELSIUS,
     UNIT_PERCENT,
@@ -48,6 +49,7 @@ CONFIG_SCHEMA = (
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_BATTERY,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
         }
     )
diff --git a/esphome/components/xiaomi_mjyd02yla/binary_sensor.py b/esphome/components/xiaomi_mjyd02yla/binary_sensor.py
index fd4bae60c1..1bedae26cf 100644
--- a/esphome/components/xiaomi_mjyd02yla/binary_sensor.py
+++ b/esphome/components/xiaomi_mjyd02yla/binary_sensor.py
@@ -10,6 +10,7 @@ from esphome.const import (
     CONF_BATTERY_LEVEL,
     DEVICE_CLASS_BATTERY,
     DEVICE_CLASS_ILLUMINANCE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     STATE_CLASS_NONE,
     UNIT_PERCENT,
@@ -51,6 +52,7 @@ CONFIG_SCHEMA = cv.All(
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_BATTERY,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
             cv.Optional(CONF_ILLUMINANCE): sensor.sensor_schema(
                 unit_of_measurement=UNIT_LUX,
diff --git a/esphome/components/xiaomi_wx08zm/binary_sensor.py b/esphome/components/xiaomi_wx08zm/binary_sensor.py
index d2b353beff..8667794923 100644
--- a/esphome/components/xiaomi_wx08zm/binary_sensor.py
+++ b/esphome/components/xiaomi_wx08zm/binary_sensor.py
@@ -6,6 +6,7 @@ from esphome.const import (
     CONF_MAC_ADDRESS,
     CONF_TABLET,
     DEVICE_CLASS_BATTERY,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     STATE_CLASS_MEASUREMENT,
     UNIT_PERCENT,
     ICON_BUG,
@@ -40,6 +41,7 @@ CONFIG_SCHEMA = cv.All(
                 accuracy_decimals=0,
                 device_class=DEVICE_CLASS_BATTERY,
                 state_class=STATE_CLASS_MEASUREMENT,
+                entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
             ),
         }
     )
diff --git a/esphome/config_validation.py b/esphome/config_validation.py
index fcd014f62d..3e5c7940a4 100644
--- a/esphome/config_validation.py
+++ b/esphome/config_validation.py
@@ -12,12 +12,14 @@ from string import ascii_letters, digits
 import voluptuous as vol
 
 from esphome import core
+import esphome.codegen as cg
 from esphome.const import (
     ALLOWED_NAME_CHARS,
     CONF_AVAILABILITY,
     CONF_COMMAND_TOPIC,
     CONF_DISABLED_BY_DEFAULT,
     CONF_DISCOVERY,
+    CONF_ENTITY_CATEGORY,
     CONF_ICON,
     CONF_ID,
     CONF_INTERNAL,
@@ -35,6 +37,9 @@ from esphome.const import (
     CONF_UPDATE_INTERVAL,
     CONF_TYPE_ID,
     CONF_TYPE,
+    ENTITY_CATEGORY_CONFIG,
+    ENTITY_CATEGORY_DIAGNOSTIC,
+    ENTITY_CATEGORY_NONE,
     KEY_CORE,
     KEY_FRAMEWORK_VERSION,
     KEY_TARGET_FRAMEWORK,
@@ -1551,6 +1556,17 @@ def maybe_simple_value(*validators, **kwargs):
     return validate
 
 
+_ENTITY_CATEGORIES = {
+    ENTITY_CATEGORY_NONE: cg.EntityCategory.ENTITY_CATEGORY_NONE,
+    ENTITY_CATEGORY_CONFIG: cg.EntityCategory.ENTITY_CATEGORY_CONFIG,
+    ENTITY_CATEGORY_DIAGNOSTIC: cg.EntityCategory.ENTITY_CATEGORY_DIAGNOSTIC,
+}
+
+
+def entity_category(value):
+    return enum(_ENTITY_CATEGORIES, lower=True)(value)
+
+
 MQTT_COMPONENT_AVAILABILITY_SCHEMA = Schema(
     {
         Required(CONF_TOPIC): subscribe_topic,
@@ -1582,6 +1598,7 @@ ENTITY_BASE_SCHEMA = Schema(
         Optional(CONF_INTERNAL): boolean,
         Optional(CONF_DISABLED_BY_DEFAULT, default=False): boolean,
         Optional(CONF_ICON): icon,
+        Optional(CONF_ENTITY_CATEGORY): entity_category,
     }
 )
 
diff --git a/esphome/const.py b/esphome/const.py
index eb7d56d7e1..ff8510b40e 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -203,6 +203,7 @@ CONF_ELSE = "else"
 CONF_ENABLE_PIN = "enable_pin"
 CONF_ENABLE_TIME = "enable_time"
 CONF_ENERGY = "energy"
+CONF_ENTITY_CATEGORY = "entity_category"
 CONF_ENTITY_ID = "entity_id"
 CONF_ESP8266_DISABLE_SSL_SUPPORT = "esp8266_disable_ssl_support"
 CONF_ESPHOME = "esphome"
@@ -919,3 +920,12 @@ KEY_CORE = "core"
 KEY_TARGET_PLATFORM = "target_platform"
 KEY_TARGET_FRAMEWORK = "target_framework"
 KEY_FRAMEWORK_VERSION = "framework_version"
+
+# Entity categories
+ENTITY_CATEGORY_NONE = ""
+
+# The entity category for configuration values/controls
+ENTITY_CATEGORY_CONFIG = "config"
+
+# The entity category for read only diagnostic values, for example RSSI, uptime or MAC Address
+ENTITY_CATEGORY_DIAGNOSTIC = "diagnostic"
diff --git a/esphome/core/entity_base.cpp b/esphome/core/entity_base.cpp
index bc94da85fe..41f08b28a6 100644
--- a/esphome/core/entity_base.cpp
+++ b/esphome/core/entity_base.cpp
@@ -26,6 +26,10 @@ void EntityBase::set_disabled_by_default(bool disabled_by_default) { this->disab
 const std::string &EntityBase::get_icon() const { return this->icon_; }
 void EntityBase::set_icon(const std::string &name) { this->icon_ = name; }
 
+// Entity Category
+EntityCategory EntityBase::get_entity_category() const { return this->entity_category_; }
+void EntityBase::set_entity_category(EntityCategory entity_category) { this->entity_category_ = entity_category; }
+
 // Entity Object ID
 const std::string &EntityBase::get_object_id() { return this->object_id_; }
 
diff --git a/esphome/core/entity_base.h b/esphome/core/entity_base.h
index 263747b721..c489d71910 100644
--- a/esphome/core/entity_base.h
+++ b/esphome/core/entity_base.h
@@ -5,6 +5,12 @@
 
 namespace esphome {
 
+enum EntityCategory : uint8_t {
+  ENTITY_CATEGORY_NONE = 0,
+  ENTITY_CATEGORY_CONFIG = 1,
+  ENTITY_CATEGORY_DIAGNOSTIC = 2,
+};
+
 // The generic Entity base class that provides an interface common to all Entities.
 class EntityBase {
  public:
@@ -31,6 +37,10 @@ class EntityBase {
   bool is_disabled_by_default() const;
   void set_disabled_by_default(bool disabled_by_default);
 
+  // Get/set the entity category.
+  EntityCategory get_entity_category() const;
+  void set_entity_category(EntityCategory entity_category);
+
   // Get/set this entity's icon
   const std::string &get_icon() const;
   void set_icon(const std::string &name);
@@ -45,6 +55,7 @@ class EntityBase {
   uint32_t object_id_hash_;
   bool internal_{false};
   bool disabled_by_default_{false};
+  EntityCategory entity_category_{ENTITY_CATEGORY_NONE};
 };
 
 }  // namespace esphome
diff --git a/esphome/cpp_helpers.py b/esphome/cpp_helpers.py
index 5b081698ad..9127f88e39 100644
--- a/esphome/cpp_helpers.py
+++ b/esphome/cpp_helpers.py
@@ -2,6 +2,7 @@ import logging
 
 from esphome.const import (
     CONF_DISABLED_BY_DEFAULT,
+    CONF_ENTITY_CATEGORY,
     CONF_ICON,
     CONF_INTERNAL,
     CONF_NAME,
@@ -102,6 +103,8 @@ async def setup_entity(var, config):
         add(var.set_internal(config[CONF_INTERNAL]))
     if CONF_ICON in config:
         add(var.set_icon(config[CONF_ICON]))
+    if CONF_ENTITY_CATEGORY in config:
+        add(var.set_entity_category(config[CONF_ENTITY_CATEGORY]))
 
 
 def extract_registry_entry_config(registry, full_config):
diff --git a/esphome/cpp_types.py b/esphome/cpp_types.py
index 888c319024..13d088e1cb 100644
--- a/esphome/cpp_types.py
+++ b/esphome/cpp_types.py
@@ -34,3 +34,4 @@ GPIOPin = esphome_ns.class_("GPIOPin")
 InternalGPIOPin = esphome_ns.class_("InternalGPIOPin", GPIOPin)
 gpio_ns = esphome_ns.namespace("gpio")
 gpio_Flags = gpio_ns.enum("Flags", is_class=True)
+EntityCategory = esphome_ns.enum("EntityCategory")