diff --git a/homeassistant/components/onkyo/__init__.py b/homeassistant/components/onkyo/__init__.py
index adbcb605b6c..df09189646d 100644
--- a/homeassistant/components/onkyo/__init__.py
+++ b/homeassistant/components/onkyo/__init__.py
@@ -18,7 +18,7 @@ from .const import (
     ListeningMode,
 )
 from .receiver import ReceiverManager, async_interview
-from .services import DATA_MP_ENTITIES, async_setup_services
+from .services import async_setup_services
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -47,7 +47,6 @@ async def async_setup(hass: HomeAssistant, _: ConfigType) -> bool:
 
 async def async_setup_entry(hass: HomeAssistant, entry: OnkyoConfigEntry) -> bool:
     """Set up the Onkyo config entry."""
-
     host = entry.data[CONF_HOST]
 
     try:
@@ -80,8 +79,6 @@ async def async_setup_entry(hass: HomeAssistant, entry: OnkyoConfigEntry) -> boo
 
 async def async_unload_entry(hass: HomeAssistant, entry: OnkyoConfigEntry) -> bool:
     """Unload Onkyo config entry."""
-    del hass.data[DATA_MP_ENTITIES][entry.entry_id]
-
     entry.runtime_data.manager.start_unloading()
 
     return await hass.config_entries.async_unload_platforms(entry, PLATFORMS)
diff --git a/homeassistant/components/onkyo/media_player.py b/homeassistant/components/onkyo/media_player.py
index a0078f9b2e3..37065fd5aec 100644
--- a/homeassistant/components/onkyo/media_player.py
+++ b/homeassistant/components/onkyo/media_player.py
@@ -4,7 +4,7 @@ from __future__ import annotations
 
 import asyncio
 import logging
-from typing import Any
+from typing import TYPE_CHECKING, Any
 
 from aioonkyo import Code, Kind, Status, Zone, command, query, status
 
@@ -14,11 +14,11 @@ from homeassistant.components.media_player import (
     MediaPlayerState,
     MediaType,
 )
-from homeassistant.core import HomeAssistant
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.exceptions import ServiceValidationError
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
+from homeassistant.util.hass_dict import HassKey
 
-from . import OnkyoConfigEntry
 from .const import (
     DOMAIN,
     LEGACY_HDMI_OUTPUT_MAPPING,
@@ -31,12 +31,17 @@ from .const import (
     VolumeResolution,
 )
 from .receiver import ReceiverManager
-from .services import DATA_MP_ENTITIES
 from .util import get_meaning
 
+if TYPE_CHECKING:
+    from . import OnkyoConfigEntry
+
 _LOGGER = logging.getLogger(__name__)
 
 
+DATA_MP_ENTITIES: HassKey[dict[str, dict[Zone, OnkyoMediaPlayer]]] = HassKey(DOMAIN)
+
+
 SUPPORTED_FEATURES_BASE = (
     MediaPlayerEntityFeature.TURN_ON
     | MediaPlayerEntityFeature.TURN_OFF
@@ -104,6 +109,12 @@ async def async_setup_entry(
     entities: dict[Zone, OnkyoMediaPlayer] = {}
     all_entities[entry.entry_id] = entities
 
+    @callback
+    def del_mp_entities() -> None:
+        del all_entities[entry.entry_id]
+
+    entry.async_on_unload(del_mp_entities)
+
     volume_resolution: VolumeResolution = entry.options[OPTION_VOLUME_RESOLUTION]
     max_volume: float = entry.options[OPTION_MAX_VOLUME]
     sources = data.sources
diff --git a/homeassistant/components/onkyo/services.py b/homeassistant/components/onkyo/services.py
index cfd246d9af7..219a8843a44 100644
--- a/homeassistant/components/onkyo/services.py
+++ b/homeassistant/components/onkyo/services.py
@@ -2,23 +2,15 @@
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING
-
-from aioonkyo import Zone
 import voluptuous as vol
 
 from homeassistant.components.media_player import DOMAIN as MEDIA_PLAYER_DOMAIN
 from homeassistant.const import ATTR_ENTITY_ID
 from homeassistant.core import HomeAssistant, ServiceCall, callback
 from homeassistant.helpers import config_validation as cv
-from homeassistant.util.hass_dict import HassKey
 
-from .const import DOMAIN, LEGACY_REV_HDMI_OUTPUT_MAPPING
-
-if TYPE_CHECKING:
-    from .media_player import OnkyoMediaPlayer
-
-DATA_MP_ENTITIES: HassKey[dict[str, dict[Zone, OnkyoMediaPlayer]]] = HassKey(DOMAIN)
+from .const import LEGACY_REV_HDMI_OUTPUT_MAPPING
+from .media_player import DATA_MP_ENTITIES, OnkyoMediaPlayer
 
 ATTR_HDMI_OUTPUT = "hdmi_output"
 ONKYO_SELECT_OUTPUT_SCHEMA = vol.Schema(