diff --git a/esphome/components/uptime/sensor.py b/esphome/components/uptime/sensor.py
index 103bc3a666..07d7d8f2cf 100644
--- a/esphome/components/uptime/sensor.py
+++ b/esphome/components/uptime/sensor.py
@@ -6,6 +6,7 @@ from esphome.const import (
     STATE_CLASS_TOTAL_INCREASING,
     UNIT_SECOND,
     ICON_TIMER,
+    DEVICE_CLASS_DURATION,
 )
 
 uptime_ns = cg.esphome_ns.namespace("uptime")
@@ -17,6 +18,7 @@ CONFIG_SCHEMA = sensor.sensor_schema(
     icon=ICON_TIMER,
     accuracy_decimals=0,
     state_class=STATE_CLASS_TOTAL_INCREASING,
+    device_class=DEVICE_CLASS_DURATION,
     entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
 ).extend(cv.polling_component_schema("60s"))