diff --git a/homeassistant/components/airgradient/entity.py b/homeassistant/components/airgradient/entity.py
index 51256051259..1d5430e5403 100644
--- a/homeassistant/components/airgradient/entity.py
+++ b/homeassistant/components/airgradient/entity.py
@@ -6,6 +6,7 @@ from typing import Any, Concatenate
 from airgradient import AirGradientConnectionError, AirGradientError, get_model_name
 
 from homeassistant.exceptions import HomeAssistantError
+from homeassistant.helpers import device_registry as dr
 from homeassistant.helpers.device_registry import DeviceInfo
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
@@ -29,6 +30,7 @@ class AirGradientEntity(CoordinatorEntity[AirGradientCoordinator]):
             model_id=measures.model,
             serial_number=coordinator.serial_number,
             sw_version=measures.firmware_version,
+            connections={(dr.CONNECTION_NETWORK_MAC, coordinator.serial_number)},
         )
 
 
diff --git a/tests/components/airgradient/snapshots/test_init.ambr b/tests/components/airgradient/snapshots/test_init.ambr
index 4e0c8027b43..b3181fddfeb 100644
--- a/tests/components/airgradient/snapshots/test_init.ambr
+++ b/tests/components/airgradient/snapshots/test_init.ambr
@@ -6,6 +6,10 @@
     'config_entries_subentries': <ANY>,
     'configuration_url': None,
     'connections': set({
+      tuple(
+        'mac',
+        '84:fc:e6:12:f5:b8',
+      ),
     }),
     'disabled_by': None,
     'entry_type': None,
@@ -39,6 +43,10 @@
     'config_entries_subentries': <ANY>,
     'configuration_url': None,
     'connections': set({
+      tuple(
+        'mac',
+        '84:fc:e6:12:f5:b8',
+      ),
     }),
     'disabled_by': None,
     'entry_type': None,