diff --git a/esphome/components/number/__init__.py b/esphome/components/number/__init__.py
index 4beed57188..90a1619e4c 100644
--- a/esphome/components/number/__init__.py
+++ b/esphome/components/number/__init__.py
@@ -19,6 +19,7 @@ from esphome.const import (
     CONF_UNIT_OF_MEASUREMENT,
     CONF_VALUE,
     CONF_WEB_SERVER,
+    DEVICE_CLASS_ABSOLUTE_HUMIDITY,
     DEVICE_CLASS_APPARENT_POWER,
     DEVICE_CLASS_AQI,
     DEVICE_CLASS_AREA,
@@ -81,6 +82,7 @@ from esphome.cpp_generator import MockObjClass
 
 CODEOWNERS = ["@esphome/core"]
 DEVICE_CLASSES = [
+    DEVICE_CLASS_ABSOLUTE_HUMIDITY,
     DEVICE_CLASS_APPARENT_POWER,
     DEVICE_CLASS_AQI,
     DEVICE_CLASS_AREA,
diff --git a/esphome/components/sensor/__init__.py b/esphome/components/sensor/__init__.py
index ea74361d51..bcde623df2 100644
--- a/esphome/components/sensor/__init__.py
+++ b/esphome/components/sensor/__init__.py
@@ -41,6 +41,7 @@ from esphome.const import (
     CONF_VALUE,
     CONF_WEB_SERVER,
     CONF_WINDOW_SIZE,
+    DEVICE_CLASS_ABSOLUTE_HUMIDITY,
     DEVICE_CLASS_APPARENT_POWER,
     DEVICE_CLASS_AQI,
     DEVICE_CLASS_AREA,
@@ -107,6 +108,7 @@ from esphome.util import Registry
 
 CODEOWNERS = ["@esphome/core"]
 DEVICE_CLASSES = [
+    DEVICE_CLASS_ABSOLUTE_HUMIDITY,
     DEVICE_CLASS_APPARENT_POWER,
     DEVICE_CLASS_AQI,
     DEVICE_CLASS_AREA,
diff --git a/esphome/const.py b/esphome/const.py
index 333e822cfa..c5876a031b 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -1193,6 +1193,7 @@ UNIT_WATT = "W"
 UNIT_WATT_HOURS = "Wh"
 
 # device classes
+DEVICE_CLASS_ABSOLUTE_HUMIDITY = "absolute_humidity"
 DEVICE_CLASS_APPARENT_POWER = "apparent_power"
 DEVICE_CLASS_AQI = "aqi"
 DEVICE_CLASS_AREA = "area"