diff --git a/homeassistant/components/moon/icons.json b/homeassistant/components/moon/icons.json
new file mode 100644
index 00000000000..77c578c8f0d
--- /dev/null
+++ b/homeassistant/components/moon/icons.json
@@ -0,0 +1,19 @@
+{
+  "entity": {
+    "sensor": {
+      "phase": {
+        "default": "mdi:weather-night",
+        "state": {
+          "first_quarter": "mdi:moon-first-quarter",
+          "full_moon": "mdi:moon-full",
+          "last_quarter": "mdi:moon-last-quarter",
+          "new_moon": "mdi:moon-new",
+          "waning_crescent": "mdi:moon-waning-crescent",
+          "waning_gibbous": "mdi:moon-waning-gibbous",
+          "waxing_crescent": "mdi:moon-waxing-crescent",
+          "waxing_gibbous": "mdi:moon-waxing-gibbous"
+        }
+      }
+    }
+  }
+}
diff --git a/homeassistant/components/moon/sensor.py b/homeassistant/components/moon/sensor.py
index cef1dbffbb3..1e2674a24bf 100644
--- a/homeassistant/components/moon/sensor.py
+++ b/homeassistant/components/moon/sensor.py
@@ -22,17 +22,6 @@ STATE_WANING_GIBBOUS = "waning_gibbous"
 STATE_WAXING_CRESCENT = "waxing_crescent"
 STATE_WAXING_GIBBOUS = "waxing_gibbous"
 
-MOON_ICONS = {
-    STATE_FIRST_QUARTER: "mdi:moon-first-quarter",
-    STATE_FULL_MOON: "mdi:moon-full",
-    STATE_LAST_QUARTER: "mdi:moon-last-quarter",
-    STATE_NEW_MOON: "mdi:moon-new",
-    STATE_WANING_CRESCENT: "mdi:moon-waning-crescent",
-    STATE_WANING_GIBBOUS: "mdi:moon-waning-gibbous",
-    STATE_WAXING_CRESCENT: "mdi:moon-waxing-crescent",
-    STATE_WAXING_GIBBOUS: "mdi:moon-waxing-gibbous",
-}
-
 
 async def async_setup_entry(
     hass: HomeAssistant,
@@ -90,5 +79,3 @@ class MoonSensorEntity(SensorEntity):
             self._attr_native_value = STATE_LAST_QUARTER
         else:
             self._attr_native_value = STATE_WANING_CRESCENT
-
-        self._attr_icon = MOON_ICONS.get(self._attr_native_value)
diff --git a/tests/components/moon/test_sensor.py b/tests/components/moon/test_sensor.py
index b3d5eb03428..8dd50bfa99d 100644
--- a/tests/components/moon/test_sensor.py
+++ b/tests/components/moon/test_sensor.py
@@ -7,7 +7,6 @@ from unittest.mock import patch
 import pytest
 
 from homeassistant.components.moon.sensor import (
-    MOON_ICONS,
     STATE_FIRST_QUARTER,
     STATE_FULL_MOON,
     STATE_LAST_QUARTER,
@@ -18,7 +17,7 @@ from homeassistant.components.moon.sensor import (
     STATE_WAXING_GIBBOUS,
 )
 from homeassistant.components.sensor import ATTR_OPTIONS, SensorDeviceClass
-from homeassistant.const import ATTR_DEVICE_CLASS, ATTR_FRIENDLY_NAME, ATTR_ICON
+from homeassistant.const import ATTR_DEVICE_CLASS, ATTR_FRIENDLY_NAME
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import device_registry as dr, entity_registry as er
 
@@ -26,16 +25,16 @@ from tests.common import MockConfigEntry
 
 
 @pytest.mark.parametrize(
-    ("moon_value", "native_value", "icon"),
+    ("moon_value", "native_value"),
     [
-        (0, STATE_NEW_MOON, MOON_ICONS[STATE_NEW_MOON]),
-        (5, STATE_WAXING_CRESCENT, MOON_ICONS[STATE_WAXING_CRESCENT]),
-        (7, STATE_FIRST_QUARTER, MOON_ICONS[STATE_FIRST_QUARTER]),
-        (12, STATE_WAXING_GIBBOUS, MOON_ICONS[STATE_WAXING_GIBBOUS]),
-        (14.3, STATE_FULL_MOON, MOON_ICONS[STATE_FULL_MOON]),
-        (20.1, STATE_WANING_GIBBOUS, MOON_ICONS[STATE_WANING_GIBBOUS]),
-        (20.8, STATE_LAST_QUARTER, MOON_ICONS[STATE_LAST_QUARTER]),
-        (23, STATE_WANING_CRESCENT, MOON_ICONS[STATE_WANING_CRESCENT]),
+        (0, STATE_NEW_MOON),
+        (5, STATE_WAXING_CRESCENT),
+        (7, STATE_FIRST_QUARTER),
+        (12, STATE_WAXING_GIBBOUS),
+        (14.3, STATE_FULL_MOON),
+        (20.1, STATE_WANING_GIBBOUS),
+        (20.8, STATE_LAST_QUARTER),
+        (23, STATE_WANING_CRESCENT),
     ],
 )
 async def test_moon_day(
@@ -45,7 +44,6 @@ async def test_moon_day(
     mock_config_entry: MockConfigEntry,
     moon_value: float,
     native_value: str,
-    icon: str,
 ) -> None:
     """Test the Moon sensor."""
     mock_config_entry.add_to_hass(hass)
@@ -59,7 +57,6 @@ async def test_moon_day(
     state = hass.states.get("sensor.moon_phase")
     assert state
     assert state.state == native_value
-    assert state.attributes[ATTR_ICON] == icon
     assert state.attributes[ATTR_FRIENDLY_NAME] == "Moon Phase"
     assert state.attributes[ATTR_DEVICE_CLASS] == SensorDeviceClass.ENUM
     assert state.attributes[ATTR_OPTIONS] == [