diff --git a/homeassistant/components/cast/media_player.py b/homeassistant/components/cast/media_player.py
index ea21259ccc4..958c53ae394 100644
--- a/homeassistant/components/cast/media_player.py
+++ b/homeassistant/components/cast/media_player.py
@@ -30,6 +30,7 @@ from homeassistant.components import media_source, zeroconf
 from homeassistant.components.media_player import (
     BrowseError,
     BrowseMedia,
+    MediaPlayerDeviceClass,
     MediaPlayerEntity,
     MediaPlayerEntityFeature,
     async_process_play_media_url,
@@ -300,6 +301,12 @@ class CastMediaPlayerEntity(CastDevice, MediaPlayerEntity):
             name=str(cast_info.friendly_name),
         )
 
+        if cast_info.cast_info.cast_type in [
+            pychromecast.const.CAST_TYPE_AUDIO,
+            pychromecast.const.CAST_TYPE_GROUP,
+        ]:
+            self._attr_device_class = MediaPlayerDeviceClass.SPEAKER
+
     async def async_added_to_hass(self):
         """Create chromecast object when added to hass."""
         self._async_setup(self.entity_id)