diff --git a/homeassistant/components/onkyo/media_player.py b/homeassistant/components/onkyo/media_player.py
index 5f81d47e38f9..5d4e542c1dc5 100644
--- a/homeassistant/components/onkyo/media_player.py
+++ b/homeassistant/components/onkyo/media_player.py
@@ -7,6 +7,7 @@ from typing import TYPE_CHECKING, Any, override
 from aioonkyo import Code, Kind, Status, Zone, command, query, status
 
 from homeassistant.components.media_player import (
+    MediaPlayerDeviceClass,
     MediaPlayerEntity,
     MediaPlayerEntityFeature,
     MediaPlayerState,
@@ -169,6 +170,7 @@ async def async_setup_entry(
 class OnkyoMediaPlayer(MediaPlayerEntity):
     """Onkyo Receiver Media Player (one per each zone)."""
 
+    _attr_device_class = MediaPlayerDeviceClass.RECEIVER
     _attr_should_poll = False
     _attr_has_entity_name = True
 
diff --git a/tests/components/onkyo/snapshots/test_media_player.ambr b/tests/components/onkyo/snapshots/test_media_player.ambr
index eddd93f66d42..6f989e8dd3f5 100644
--- a/tests/components/onkyo/snapshots/test_media_player.ambr
+++ b/tests/components/onkyo/snapshots/test_media_player.ambr
@@ -33,7 +33,7 @@
     'object_id_base': 'TX-NR7100',
     'options': dict({
     }),
-    'original_device_class': None,
+    'original_device_class': <MediaPlayerDeviceClass.RECEIVER: 'receiver'>,
     'original_icon': None,
     'original_name': 'TX-NR7100',
     'platform': 'onkyo',
@@ -51,6 +51,7 @@
       'audio_information': dict({
         'auto_phase_control_phase': 'Normal',
       }),
+      <EntityStateAttribute.DEVICE_CLASS: 'device_class'>: 'receiver',
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'TX-NR7100',
       <MediaPlayerEntityStateAttribute.MEDIA_VOLUME_MUTED: 'is_volume_muted'>: False,
       'preset': 1,
@@ -111,7 +112,7 @@
     'object_id_base': 'TX-NR7100 Zone 2',
     'options': dict({
     }),
-    'original_device_class': None,
+    'original_device_class': <MediaPlayerDeviceClass.RECEIVER: 'receiver'>,
     'original_icon': None,
     'original_name': 'TX-NR7100 Zone 2',
     'platform': 'onkyo',
@@ -126,6 +127,7 @@
 # name: test_entities[media_player.tx_nr7100_zone_2-state]
   StateSnapshot({
     'attributes': ReadOnlyDict({
+      <EntityStateAttribute.DEVICE_CLASS: 'device_class'>: 'receiver',
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'TX-NR7100 Zone 2',
       <MediaPlayerEntityStateAttribute.SOUND_MODE: 'sound_mode'>: 'Stereo',
       <MediaPlayerEntityCapabilityAttribute.SOUND_MODE_LIST: 'sound_mode_list'>: list([
@@ -177,7 +179,7 @@
     'object_id_base': 'TX-NR7100 Zone 3',
     'options': dict({
     }),
-    'original_device_class': None,
+    'original_device_class': <MediaPlayerDeviceClass.RECEIVER: 'receiver'>,
     'original_icon': None,
     'original_name': 'TX-NR7100 Zone 3',
     'platform': 'onkyo',
@@ -192,6 +194,7 @@
 # name: test_entities[media_player.tx_nr7100_zone_3-state]
   StateSnapshot({
     'attributes': ReadOnlyDict({
+      <EntityStateAttribute.DEVICE_CLASS: 'device_class'>: 'receiver',
       <EntityStateAttribute.FRIENDLY_NAME: 'friendly_name'>: 'TX-NR7100 Zone 3',
       <MediaPlayerEntityCapabilityAttribute.INPUT_SOURCE_LIST: 'source_list'>: list([
         'TV',