diff --git a/homeassistant/components/demo/media_player.py b/homeassistant/components/demo/media_player.py
index f00f1fb781e..2ea360ebb81 100644
--- a/homeassistant/components/demo/media_player.py
+++ b/homeassistant/components/demo/media_player.py
@@ -4,12 +4,14 @@ from homeassistant.components.media_player.const import (
     MEDIA_TYPE_MOVIE,
     MEDIA_TYPE_MUSIC,
     MEDIA_TYPE_TVSHOW,
+    REPEAT_MODE_OFF,
     SUPPORT_CLEAR_PLAYLIST,
     SUPPORT_NEXT_TRACK,
     SUPPORT_PAUSE,
     SUPPORT_PLAY,
     SUPPORT_PLAY_MEDIA,
     SUPPORT_PREVIOUS_TRACK,
+    SUPPORT_REPEAT_SET,
     SUPPORT_SEEK,
     SUPPORT_SELECT_SOUND_MODE,
     SUPPORT_SELECT_SOURCE,
@@ -73,6 +75,7 @@ MUSIC_PLAYER_SUPPORT = (
     | SUPPORT_CLEAR_PLAYLIST
     | SUPPORT_PLAY
     | SUPPORT_SHUFFLE_SET
+    | SUPPORT_REPEAT_SET
     | SUPPORT_VOLUME_STEP
     | SUPPORT_PREVIOUS_TRACK
     | SUPPORT_NEXT_TRACK
@@ -319,6 +322,7 @@ class DemoMusicPlayer(AbstractDemoPlayer):
         """Initialize the demo device."""
         super().__init__("Walkman")
         self._cur_track = 0
+        self._repeat = REPEAT_MODE_OFF
 
     @property
     def media_content_id(self):
@@ -360,6 +364,11 @@ class DemoMusicPlayer(AbstractDemoPlayer):
         """Return the track number of current media (Music track only)."""
         return self._cur_track + 1
 
+    @property
+    def repeat(self):
+        """Return current repeat mode."""
+        return self._repeat
+
     @property
     def supported_features(self):
         """Flag media player features that are supported."""
@@ -384,6 +393,11 @@ class DemoMusicPlayer(AbstractDemoPlayer):
         self._player_state = STATE_OFF
         self.schedule_update_ha_state()
 
+    def set_repeat(self, repeat):
+        """Enable/disable repeat mode."""
+        self._repeat = repeat
+        self.schedule_update_ha_state()
+
 
 class DemoTVShowPlayer(AbstractDemoPlayer):
     """A Demo media player that only supports YouTube."""
diff --git a/homeassistant/components/media_player/__init__.py b/homeassistant/components/media_player/__init__.py
index 52d61339c38..1985fac1c1d 100644
--- a/homeassistant/components/media_player/__init__.py
+++ b/homeassistant/components/media_player/__init__.py
@@ -35,6 +35,7 @@ from homeassistant.const import (
     SERVICE_MEDIA_PREVIOUS_TRACK,
     SERVICE_MEDIA_SEEK,
     SERVICE_MEDIA_STOP,
+    SERVICE_REPEAT_SET,
     SERVICE_SHUFFLE_SET,
     SERVICE_TOGGLE,
     SERVICE_TURN_OFF,
@@ -76,6 +77,7 @@ from .const import (
     ATTR_MEDIA_PLAYLIST,
     ATTR_MEDIA_POSITION,
     ATTR_MEDIA_POSITION_UPDATED_AT,
+    ATTR_MEDIA_REPEAT,
     ATTR_MEDIA_SEASON,
     ATTR_MEDIA_SEEK_POSITION,
     ATTR_MEDIA_SERIES_TITLE,
@@ -88,6 +90,7 @@ from .const import (
     ATTR_SOUND_MODE_LIST,
     DOMAIN,
     MEDIA_CLASS_DIRECTORY,
+    REPEAT_MODES,
     SERVICE_CLEAR_PLAYLIST,
     SERVICE_PLAY_MEDIA,
     SERVICE_SELECT_SOUND_MODE,
@@ -99,6 +102,7 @@ from .const import (
     SUPPORT_PLAY,
     SUPPORT_PLAY_MEDIA,
     SUPPORT_PREVIOUS_TRACK,
+    SUPPORT_REPEAT_SET,
     SUPPORT_SEEK,
     SUPPORT_SELECT_SOUND_MODE,
     SUPPORT_SELECT_SOURCE,
@@ -167,6 +171,7 @@ ATTR_TO_PROPERTY = [
     ATTR_INPUT_SOURCE,
     ATTR_SOUND_MODE,
     ATTR_MEDIA_SHUFFLE,
+    ATTR_MEDIA_REPEAT,
 ]
 
 
@@ -325,6 +330,13 @@ async def async_setup(hass, config):
         [SUPPORT_SHUFFLE_SET],
     )
 
+    component.async_register_entity_service(
+        SERVICE_REPEAT_SET,
+        {vol.Required(ATTR_MEDIA_REPEAT): vol.In(REPEAT_MODES)},
+        "async_set_repeat",
+        [SUPPORT_REPEAT_SET],
+    )
+
     return True
 
 
@@ -508,6 +520,11 @@ class MediaPlayerEntity(Entity):
         """Boolean if shuffle is enabled."""
         return None
 
+    @property
+    def repeat(self):
+        """Return current repeat mode."""
+        return None
+
     @property
     def supported_features(self):
         """Flag media player features that are supported."""
@@ -635,6 +652,14 @@ class MediaPlayerEntity(Entity):
         """Enable/disable shuffle mode."""
         await self.hass.async_add_executor_job(self.set_shuffle, shuffle)
 
+    def set_repeat(self, repeat):
+        """Set repeat mode."""
+        raise NotImplementedError()
+
+    async def async_set_repeat(self, repeat):
+        """Set repeat mode."""
+        await self.hass.async_add_job(self.set_repeat, repeat)
+
     # No need to overwrite these.
     @property
     def support_play(self):
diff --git a/homeassistant/components/media_player/const.py b/homeassistant/components/media_player/const.py
index 3db31006341..e170132d48b 100644
--- a/homeassistant/components/media_player/const.py
+++ b/homeassistant/components/media_player/const.py
@@ -17,6 +17,7 @@ ATTR_MEDIA_EPISODE = "media_episode"
 ATTR_MEDIA_PLAYLIST = "media_playlist"
 ATTR_MEDIA_POSITION = "media_position"
 ATTR_MEDIA_POSITION_UPDATED_AT = "media_position_updated_at"
+ATTR_MEDIA_REPEAT = "repeat"
 ATTR_MEDIA_SEASON = "media_season"
 ATTR_MEDIA_SEEK_POSITION = "seek_position"
 ATTR_MEDIA_SERIES_TITLE = "media_series_title"
@@ -78,6 +79,11 @@ SERVICE_PLAY_MEDIA = "play_media"
 SERVICE_SELECT_SOUND_MODE = "select_sound_mode"
 SERVICE_SELECT_SOURCE = "select_source"
 
+REPEAT_MODE_ALL = "all"
+REPEAT_MODE_OFF = "off"
+REPEAT_MODE_ONE = "one"
+REPEAT_MODES = [REPEAT_MODE_ALL, REPEAT_MODE_OFF, REPEAT_MODE_ONE]
+
 SUPPORT_PAUSE = 1
 SUPPORT_SEEK = 2
 SUPPORT_VOLUME_SET = 4
@@ -96,3 +102,4 @@ SUPPORT_PLAY = 16384
 SUPPORT_SHUFFLE_SET = 32768
 SUPPORT_SELECT_SOUND_MODE = 65536
 SUPPORT_BROWSE_MEDIA = 131072
+SUPPORT_REPEAT_SET = 262144
diff --git a/homeassistant/components/media_player/services.yaml b/homeassistant/components/media_player/services.yaml
index 99fdb30b5c5..08637df0745 100644
--- a/homeassistant/components/media_player/services.yaml
+++ b/homeassistant/components/media_player/services.yaml
@@ -156,3 +156,13 @@ shuffle_set:
     shuffle:
       description: True/false for enabling/disabling shuffle.
       example: true
+
+repeat_set:
+  description: Set repeat mode.
+  fields:
+    entity_id:
+      description: Name(s) of entities to set.
+      example: "media_player.sonos"
+    repeat:
+      description: Repeat mode to set (off, all, one).
+      example: "off"
diff --git a/homeassistant/const.py b/homeassistant/const.py
index a40df9527f6..8d962aa0d3f 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -532,6 +532,7 @@ SERVICE_MEDIA_STOP = "media_stop"
 SERVICE_MEDIA_NEXT_TRACK = "media_next_track"
 SERVICE_MEDIA_PREVIOUS_TRACK = "media_previous_track"
 SERVICE_MEDIA_SEEK = "media_seek"
+SERVICE_REPEAT_SET = "repeat_set"
 SERVICE_SHUFFLE_SET = "shuffle_set"
 
 SERVICE_ALARM_DISARM = "alarm_disarm"
diff --git a/tests/components/demo/test_media_player.py b/tests/components/demo/test_media_player.py
index 0d4d1d6bbe4..340416f4586 100644
--- a/tests/components/demo/test_media_player.py
+++ b/tests/components/demo/test_media_player.py
@@ -60,6 +60,27 @@ async def test_source_select(hass):
     assert state.attributes.get(mp.ATTR_INPUT_SOURCE) == "xbox"
 
 
+async def test_repeat_set(hass):
+    """Test the repeat set service."""
+    entity_id = "media_player.walkman"
+
+    assert await async_setup_component(
+        hass, mp.DOMAIN, {"media_player": {"platform": "demo"}}
+    )
+    await hass.async_block_till_done()
+    state = hass.states.get(entity_id)
+    assert state.attributes.get(mp.ATTR_MEDIA_REPEAT) == mp.const.REPEAT_MODE_OFF
+
+    await hass.services.async_call(
+        mp.DOMAIN,
+        mp.SERVICE_REPEAT_SET,
+        {ATTR_ENTITY_ID: entity_id, mp.ATTR_MEDIA_REPEAT: mp.const.REPEAT_MODE_ALL},
+        blocking=True,
+    )
+    state = hass.states.get(entity_id)
+    assert state.attributes.get(mp.ATTR_MEDIA_REPEAT) == mp.const.REPEAT_MODE_ALL
+
+
 async def test_clear_playlist(hass):
     """Test clear playlist."""
     assert await async_setup_component(