diff --git a/esphome/components/number/__init__.py b/esphome/components/number/__init__.py
index f45b8c024a..e6ad545d70 100644
--- a/esphome/components/number/__init__.py
+++ b/esphome/components/number/__init__.py
@@ -43,6 +43,7 @@ from esphome.const import (
     DEVICE_CLASS_NITROGEN_MONOXIDE,
     DEVICE_CLASS_NITROUS_OXIDE,
     DEVICE_CLASS_OZONE,
+    DEVICE_CLASS_PH,
     DEVICE_CLASS_PM1,
     DEVICE_CLASS_PM10,
     DEVICE_CLASS_PM25,
@@ -97,6 +98,7 @@ DEVICE_CLASSES = [
     DEVICE_CLASS_NITROGEN_MONOXIDE,
     DEVICE_CLASS_NITROUS_OXIDE,
     DEVICE_CLASS_OZONE,
+    DEVICE_CLASS_PH,
     DEVICE_CLASS_PM1,
     DEVICE_CLASS_PM10,
     DEVICE_CLASS_PM25,
diff --git a/esphome/components/sensor/__init__.py b/esphome/components/sensor/__init__.py
index caaffd9701..2aebf7bb17 100644
--- a/esphome/components/sensor/__init__.py
+++ b/esphome/components/sensor/__init__.py
@@ -57,6 +57,7 @@ from esphome.const import (
     DEVICE_CLASS_NITROGEN_MONOXIDE,
     DEVICE_CLASS_NITROUS_OXIDE,
     DEVICE_CLASS_OZONE,
+    DEVICE_CLASS_PH,
     DEVICE_CLASS_PM1,
     DEVICE_CLASS_PM10,
     DEVICE_CLASS_PM25,
@@ -114,6 +115,7 @@ DEVICE_CLASSES = [
     DEVICE_CLASS_NITROGEN_MONOXIDE,
     DEVICE_CLASS_NITROUS_OXIDE,
     DEVICE_CLASS_OZONE,
+    DEVICE_CLASS_PH,
     DEVICE_CLASS_PM1,
     DEVICE_CLASS_PM10,
     DEVICE_CLASS_PM25,
diff --git a/esphome/const.py b/esphome/const.py
index 1c4ccdf3a4..4977726361 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -988,6 +988,7 @@ DEVICE_CLASS_OCCUPANCY = "occupancy"
 DEVICE_CLASS_OPENING = "opening"
 DEVICE_CLASS_OUTLET = "outlet"
 DEVICE_CLASS_OZONE = "ozone"
+DEVICE_CLASS_PH = "ph"
 DEVICE_CLASS_PLUG = "plug"
 DEVICE_CLASS_PM1 = "pm1"
 DEVICE_CLASS_PM10 = "pm10"