diff --git a/esphome/components/scd30/sensor.py b/esphome/components/scd30/sensor.py
index ffbf90338f..1ddf0f1e85 100644
--- a/esphome/components/scd30/sensor.py
+++ b/esphome/components/scd30/sensor.py
@@ -10,6 +10,7 @@ from esphome.const import (
     CONF_CO2,
     CONF_UPDATE_INTERVAL,
     CONF_VALUE,
+    DEVICE_CLASS_CARBON_DIOXIDE,
     DEVICE_CLASS_HUMIDITY,
     DEVICE_CLASS_TEMPERATURE,
     STATE_CLASS_MEASUREMENT,
@@ -46,6 +47,7 @@ CONFIG_SCHEMA = (
                 unit_of_measurement=UNIT_PARTS_PER_MILLION,
                 icon=ICON_MOLECULE_CO2,
                 accuracy_decimals=0,
+                device_class=DEVICE_CLASS_CARBON_DIOXIDE,
                 state_class=STATE_CLASS_MEASUREMENT,
             ),
             cv.Optional(CONF_TEMPERATURE): sensor.sensor_schema(