diff --git a/homeassistant/components/currencylayer/sensor.py b/homeassistant/components/currencylayer/sensor.py
index 9905228c26a..b4a33392894 100644
--- a/homeassistant/components/currencylayer/sensor.py
+++ b/homeassistant/components/currencylayer/sensor.py
@@ -20,7 +20,6 @@ _RESOURCE = "http://apilayer.net/api/live"
 DEFAULT_BASE = "USD"
 DEFAULT_NAME = "CurrencyLayer Sensor"
 
-ICON = "mdi:currency"
 
 SCAN_INTERVAL = timedelta(hours=4)
 
@@ -60,6 +59,7 @@ class CurrencylayerSensor(SensorEntity):
     """Implementing the Currencylayer sensor."""
 
     _attr_attribution = "Data provided by currencylayer.com"
+    _attr_icon = "mdi:currency"
 
     def __init__(self, rest, base, quote):
         """Initialize the sensor."""
@@ -78,11 +78,6 @@ class CurrencylayerSensor(SensorEntity):
         """Return the name of the sensor."""
         return self._base
 
-    @property
-    def icon(self):
-        """Return the icon to use in the frontend, if any."""
-        return ICON
-
     @property
     def native_value(self):
         """Return the state of the sensor."""
diff --git a/homeassistant/components/dublin_bus_transport/sensor.py b/homeassistant/components/dublin_bus_transport/sensor.py
index 60d058220ab..b50bd604763 100644
--- a/homeassistant/components/dublin_bus_transport/sensor.py
+++ b/homeassistant/components/dublin_bus_transport/sensor.py
@@ -32,7 +32,7 @@ CONF_STOP_ID = "stopid"
 CONF_ROUTE = "route"
 
 DEFAULT_NAME = "Next Bus"
-ICON = "mdi:bus"
+
 
 SCAN_INTERVAL = timedelta(minutes=1)
 TIME_STR_FORMAT = "%H:%M"
@@ -77,6 +77,7 @@ class DublinPublicTransportSensor(SensorEntity):
     """Implementation of an Dublin public transport sensor."""
 
     _attr_attribution = "Data provided by data.dublinked.ie"
+    _attr_icon = "mdi:bus"
 
     def __init__(self, data, stop, route, name):
         """Initialize the sensor."""
@@ -118,11 +119,6 @@ class DublinPublicTransportSensor(SensorEntity):
         """Return the unit this state is expressed in."""
         return UnitOfTime.MINUTES
 
-    @property
-    def icon(self):
-        """Icon to use in the frontend, if any."""
-        return ICON
-
     def update(self) -> None:
         """Get the latest data from opendata.ch and update the states."""
         self.data.update()
diff --git a/homeassistant/components/fixer/sensor.py b/homeassistant/components/fixer/sensor.py
index 234f03812fe..8091f8981e3 100644
--- a/homeassistant/components/fixer/sensor.py
+++ b/homeassistant/components/fixer/sensor.py
@@ -19,12 +19,10 @@ _LOGGER = logging.getLogger(__name__)
 
 ATTR_EXCHANGE_RATE = "Exchange rate"
 ATTR_TARGET = "Target currency"
-ATTRIBUTION = "Data provided by the European Central Bank (ECB)"
 
 DEFAULT_BASE = "USD"
 DEFAULT_NAME = "Exchange rate"
 
-ICON = "mdi:currency-usd"
 
 SCAN_INTERVAL = timedelta(days=1)
 
@@ -61,7 +59,8 @@ def setup_platform(
 class ExchangeRateSensor(SensorEntity):
     """Representation of a Exchange sensor."""
 
-    _attr_attribution = ATTRIBUTION
+    _attr_attribution = "Data provided by the European Central Bank (ECB)"
+    _attr_icon = "mdi:currency-usd"
 
     def __init__(self, data, name, target):
         """Initialize the sensor."""
@@ -94,11 +93,6 @@ class ExchangeRateSensor(SensorEntity):
                 ATTR_TARGET: self._target,
             }
 
-    @property
-    def icon(self):
-        """Return the icon to use in the frontend, if any."""
-        return ICON
-
     def update(self) -> None:
         """Get the latest data and updates the states."""
         self.data.update()
diff --git a/homeassistant/components/gitter/sensor.py b/homeassistant/components/gitter/sensor.py
index 514cb9e0ad5..db5b189d5ea 100644
--- a/homeassistant/components/gitter/sensor.py
+++ b/homeassistant/components/gitter/sensor.py
@@ -23,7 +23,6 @@ ATTR_USERNAME = "username"
 DEFAULT_NAME = "Gitter messages"
 DEFAULT_ROOM = "home-assistant/home-assistant"
 
-ICON = "mdi:message-cog"
 
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
     {
@@ -59,6 +58,8 @@ def setup_platform(
 class GitterSensor(SensorEntity):
     """Representation of a Gitter sensor."""
 
+    _attr_icon = "mdi:message-cog"
+
     def __init__(self, data, room, name, username):
         """Initialize the sensor."""
         self._name = name
@@ -93,11 +94,6 @@ class GitterSensor(SensorEntity):
             ATTR_MENTION: self._mention,
         }
 
-    @property
-    def icon(self):
-        """Return the icon to use in the frontend, if any."""
-        return ICON
-
     def update(self) -> None:
         """Get the latest data and updates the state."""
 
diff --git a/homeassistant/components/homekit_controller/alarm_control_panel.py b/homeassistant/components/homekit_controller/alarm_control_panel.py
index a466d15db58..a741cf54920 100644
--- a/homeassistant/components/homekit_controller/alarm_control_panel.py
+++ b/homeassistant/components/homekit_controller/alarm_control_panel.py
@@ -27,8 +27,6 @@ from . import KNOWN_DEVICES
 from .connection import HKDevice
 from .entity import HomeKitEntity
 
-ICON = "mdi:security"
-
 CURRENT_STATE_MAP = {
     0: STATE_ALARM_ARMED_HOME,
     1: STATE_ALARM_ARMED_AWAY,
@@ -72,6 +70,7 @@ async def async_setup_entry(
 class HomeKitAlarmControlPanelEntity(HomeKitEntity, AlarmControlPanelEntity):
     """Representation of a Homekit Alarm Control Panel."""
 
+    _attr_icon = "mdi:security"
     _attr_supported_features = (
         AlarmControlPanelEntityFeature.ARM_HOME
         | AlarmControlPanelEntityFeature.ARM_AWAY
@@ -86,11 +85,6 @@ class HomeKitAlarmControlPanelEntity(HomeKitEntity, AlarmControlPanelEntity):
             CharacteristicsTypes.BATTERY_LEVEL,
         ]
 
-    @property
-    def icon(self) -> str:
-        """Return icon."""
-        return ICON
-
     @property
     def state(self) -> str:
         """Return the state of the device."""
diff --git a/homeassistant/components/irish_rail_transport/sensor.py b/homeassistant/components/irish_rail_transport/sensor.py
index 7ac30cc5a23..70b53b80d9c 100644
--- a/homeassistant/components/irish_rail_transport/sensor.py
+++ b/homeassistant/components/irish_rail_transport/sensor.py
@@ -30,7 +30,7 @@ CONF_DIRECTION = "direction"
 CONF_STOPS_AT = "stops_at"
 
 DEFAULT_NAME = "Next Train"
-ICON = "mdi:train"
+
 
 SCAN_INTERVAL = timedelta(minutes=2)
 TIME_STR_FORMAT = "%H:%M"
@@ -76,6 +76,7 @@ class IrishRailTransportSensor(SensorEntity):
     """Implementation of an irish rail public transport sensor."""
 
     _attr_attribution = "Data provided by Irish Rail"
+    _attr_icon = "mdi:train"
 
     def __init__(self, data, station, direction, destination, stops_at, name):
         """Initialize the sensor."""
@@ -128,11 +129,6 @@ class IrishRailTransportSensor(SensorEntity):
         """Return the unit this state is expressed in."""
         return UnitOfTime.MINUTES
 
-    @property
-    def icon(self):
-        """Icon to use in the frontend, if any."""
-        return ICON
-
     def update(self) -> None:
         """Get the latest data and update the states."""
         self.data.update()
diff --git a/homeassistant/components/lastfm/sensor.py b/homeassistant/components/lastfm/sensor.py
index 497ccf817bc..70f4c22cade 100644
--- a/homeassistant/components/lastfm/sensor.py
+++ b/homeassistant/components/lastfm/sensor.py
@@ -26,7 +26,6 @@ STATE_NOT_SCROBBLING = "Not Scrobbling"
 
 CONF_USERS = "users"
 
-ICON = "mdi:radio-fm"
 
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
     {
@@ -64,6 +63,7 @@ class LastfmSensor(SensorEntity):
     """A class for the Last.fm account."""
 
     _attr_attribution = "Data provided by Last.fm"
+    _attr_icon = "mdi:radio-fm"
 
     def __init__(self, user, lastfm_api):
         """Initialize the sensor."""
@@ -127,8 +127,3 @@ class LastfmSensor(SensorEntity):
     def entity_picture(self):
         """Avatar of the user."""
         return self._cover
-
-    @property
-    def icon(self):
-        """Return the icon to use in the frontend."""
-        return ICON
diff --git a/homeassistant/components/london_underground/sensor.py b/homeassistant/components/london_underground/sensor.py
index 2cad8e9a109..8217b3913a8 100644
--- a/homeassistant/components/london_underground/sensor.py
+++ b/homeassistant/components/london_underground/sensor.py
@@ -26,7 +26,6 @@ DOMAIN = "london_underground"
 
 CONF_LINE = "line"
 
-ICON = "mdi:subway"
 
 SCAN_INTERVAL = timedelta(seconds=30)
 
@@ -100,6 +99,7 @@ class LondonTubeSensor(CoordinatorEntity[LondonTubeCoordinator], SensorEntity):
     """Sensor that reads the status of a line from Tube Data."""
 
     _attr_attribution = "Powered by TfL Open Data"
+    _attr_icon = "mdi:subway"
 
     def __init__(self, coordinator, name):
         """Initialize the London Underground sensor."""
@@ -116,11 +116,6 @@ class LondonTubeSensor(CoordinatorEntity[LondonTubeCoordinator], SensorEntity):
         """Return the state of the sensor."""
         return self.coordinator.data[self.name]["State"]
 
-    @property
-    def icon(self):
-        """Icon to use in the frontend, if any."""
-        return ICON
-
     @property
     def extra_state_attributes(self):
         """Return other details about the sensor state."""
diff --git a/homeassistant/components/nederlandse_spoorwegen/sensor.py b/homeassistant/components/nederlandse_spoorwegen/sensor.py
index 7f4fbdfae7f..f0c782bc1b5 100644
--- a/homeassistant/components/nederlandse_spoorwegen/sensor.py
+++ b/homeassistant/components/nederlandse_spoorwegen/sensor.py
@@ -26,7 +26,6 @@ CONF_TO = "to"
 CONF_VIA = "via"
 CONF_TIME = "time"
 
-ICON = "mdi:train"
 
 MIN_TIME_BETWEEN_UPDATES = timedelta(seconds=120)
 
@@ -104,6 +103,7 @@ class NSDepartureSensor(SensorEntity):
     """Implementation of a NS Departure Sensor."""
 
     _attr_attribution = "Data provided by NS"
+    _attr_icon = "mdi:train"
 
     def __init__(self, nsapi, name, departure, heading, via, time):
         """Initialize the sensor."""
@@ -121,11 +121,6 @@ class NSDepartureSensor(SensorEntity):
         """Return the name of the sensor."""
         return self._name
 
-    @property
-    def icon(self):
-        """Return the icon for the frontend."""
-        return ICON
-
     @property
     def native_value(self):
         """Return the next departure time."""
diff --git a/homeassistant/components/neurio_energy/sensor.py b/homeassistant/components/neurio_energy/sensor.py
index 52f6d1d7225..a9023ffca2b 100644
--- a/homeassistant/components/neurio_energy/sensor.py
+++ b/homeassistant/components/neurio_energy/sensor.py
@@ -33,7 +33,6 @@ DAILY_NAME = "Daily Energy Usage"
 ACTIVE_TYPE = "active"
 DAILY_TYPE = "daily"
 
-ICON = "mdi:flash"
 
 MIN_TIME_BETWEEN_DAILY_UPDATES = timedelta(seconds=150)
 MIN_TIME_BETWEEN_ACTIVE_UPDATES = timedelta(seconds=10)
@@ -140,6 +139,8 @@ class NeurioData:
 class NeurioEnergy(SensorEntity):
     """Implementation of a Neurio energy sensor."""
 
+    _attr_icon = "mdi:flash"
+
     def __init__(self, data, name, sensor_type, update_call):
         """Initialize the sensor."""
         self._name = name
@@ -172,11 +173,6 @@ class NeurioEnergy(SensorEntity):
         """Return the unit of measurement of this entity, if any."""
         return self._unit_of_measurement
 
-    @property
-    def icon(self):
-        """Icon to use in the frontend, if any."""
-        return ICON
-
     def update(self) -> None:
         """Get the latest data, update state."""
         self.update_sensor()
diff --git a/homeassistant/components/numato/sensor.py b/homeassistant/components/numato/sensor.py
index 4ac28e07611..44adb78e6a0 100644
--- a/homeassistant/components/numato/sensor.py
+++ b/homeassistant/components/numato/sensor.py
@@ -23,8 +23,6 @@ from . import (
 
 _LOGGER = logging.getLogger(__name__)
 
-ICON = "mdi:gauge"
-
 
 def setup_platform(
     hass: HomeAssistant,
@@ -71,6 +69,8 @@ def setup_platform(
 class NumatoGpioAdc(SensorEntity):
     """Represents an ADC port of a Numato USB GPIO expander."""
 
+    _attr_icon = "mdi:gauge"
+
     def __init__(self, name, device_id, port, src_range, dst_range, dst_unit, api):
         """Initialize the sensor."""
         self._name = name
@@ -97,11 +97,6 @@ class NumatoGpioAdc(SensorEntity):
         """Return the unit the value is expressed in."""
         return self._unit_of_measurement
 
-    @property
-    def icon(self):
-        """Return the icon to use in the frontend, if any."""
-        return ICON
-
     def update(self) -> None:
         """Get the latest data and updates the state."""
         try:
diff --git a/homeassistant/components/oasa_telematics/sensor.py b/homeassistant/components/oasa_telematics/sensor.py
index 664ad033cfe..b9109645943 100644
--- a/homeassistant/components/oasa_telematics/sensor.py
+++ b/homeassistant/components/oasa_telematics/sensor.py
@@ -34,7 +34,7 @@ CONF_STOP_ID = "stop_id"
 CONF_ROUTE_ID = "route_id"
 
 DEFAULT_NAME = "OASA Telematics"
-ICON = "mdi:bus"
+
 
 SCAN_INTERVAL = timedelta(seconds=60)
 
@@ -67,6 +67,7 @@ class OASATelematicsSensor(SensorEntity):
     """Implementation of the OASA Telematics sensor."""
 
     _attr_attribution = "Data retrieved from telematics.oasa.gr"
+    _attr_icon = "mdi:bus"
 
     def __init__(self, data, stop_id, route_id, name):
         """Initialize the sensor."""
@@ -121,11 +122,6 @@ class OASATelematicsSensor(SensorEntity):
         )
         return {k: v for k, v in params.items() if v}
 
-    @property
-    def icon(self):
-        """Icon to use in the frontend, if any."""
-        return ICON
-
     def update(self) -> None:
         """Get the latest data from OASA API and update the states."""
         self.data.update()
diff --git a/homeassistant/components/otp/sensor.py b/homeassistant/components/otp/sensor.py
index 499c9b129f1..7c7c30df970 100644
--- a/homeassistant/components/otp/sensor.py
+++ b/homeassistant/components/otp/sensor.py
@@ -17,7 +17,6 @@ DEFAULT_NAME = "OTP Sensor"
 
 TIME_STEP = 30  # Default time step assumed by Google Authenticator
 
-ICON = "mdi:update"
 
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
     {
@@ -44,6 +43,7 @@ async def async_setup_platform(
 class TOTPSensor(SensorEntity):
     """Representation of a TOTP sensor."""
 
+    _attr_icon = "mdi:update"
     _attr_should_poll = False
 
     def __init__(self, name, token):
@@ -76,8 +76,3 @@ class TOTPSensor(SensorEntity):
     def native_value(self):
         """Return the state of the sensor."""
         return self._state
-
-    @property
-    def icon(self):
-        """Return the icon to use in the frontend."""
-        return ICON
diff --git a/homeassistant/components/pocketcasts/sensor.py b/homeassistant/components/pocketcasts/sensor.py
index 3962ae4c060..c541e2cc0f2 100644
--- a/homeassistant/components/pocketcasts/sensor.py
+++ b/homeassistant/components/pocketcasts/sensor.py
@@ -16,7 +16,6 @@ from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
 _LOGGER = logging.getLogger(__name__)
 
-ICON = "mdi:rss"
 
 SENSOR_NAME = "Pocketcasts unlistened episodes"
 
@@ -48,6 +47,8 @@ def setup_platform(
 class PocketCastsSensor(SensorEntity):
     """Representation of a pocket casts sensor."""
 
+    _attr_icon = "mdi:rss"
+
     def __init__(self, api):
         """Initialize the sensor."""
         self._api = api
@@ -63,11 +64,6 @@ class PocketCastsSensor(SensorEntity):
         """Return the sensor state."""
         return self._state
 
-    @property
-    def icon(self):
-        """Return the icon for the sensor."""
-        return ICON
-
     def update(self) -> None:
         """Update sensor values."""
         try:
diff --git a/homeassistant/components/random/sensor.py b/homeassistant/components/random/sensor.py
index 19cf403eab2..d4db30fd61e 100644
--- a/homeassistant/components/random/sensor.py
+++ b/homeassistant/components/random/sensor.py
@@ -24,7 +24,6 @@ DEFAULT_NAME = "Random Sensor"
 DEFAULT_MIN = 0
 DEFAULT_MAX = 20
 
-ICON = "mdi:hanger"
 
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
     {
@@ -54,6 +53,8 @@ async def async_setup_platform(
 class RandomSensor(SensorEntity):
     """Representation of a Random number sensor."""
 
+    _attr_icon = "mdi:hanger"
+
     def __init__(self, name, minimum, maximum, unit_of_measurement):
         """Initialize the Random sensor."""
         self._name = name
@@ -72,11 +73,6 @@ class RandomSensor(SensorEntity):
         """Return the state of the device."""
         return self._state
 
-    @property
-    def icon(self):
-        """Return the icon to use in the frontend, if any."""
-        return ICON
-
     @property
     def native_unit_of_measurement(self):
         """Return the unit this state is expressed in."""
diff --git a/homeassistant/components/rejseplanen/sensor.py b/homeassistant/components/rejseplanen/sensor.py
index 9db7c6ff100..135205aa95d 100644
--- a/homeassistant/components/rejseplanen/sensor.py
+++ b/homeassistant/components/rejseplanen/sensor.py
@@ -42,7 +42,7 @@ CONF_DIRECTION = "direction"
 CONF_DEPARTURE_TYPE = "departure_type"
 
 DEFAULT_NAME = "Next departure"
-ICON = "mdi:bus"
+
 
 SCAN_INTERVAL = timedelta(minutes=1)
 
@@ -98,6 +98,7 @@ class RejseplanenTransportSensor(SensorEntity):
     """Implementation of Rejseplanen transport sensor."""
 
     _attr_attribution = "Data provided by rejseplanen.dk"
+    _attr_icon = "mdi:bus"
 
     def __init__(self, data, stop_id, route, direction, name):
         """Initialize the sensor."""
@@ -143,11 +144,6 @@ class RejseplanenTransportSensor(SensorEntity):
         """Return the unit this state is expressed in."""
         return UnitOfTime.MINUTES
 
-    @property
-    def icon(self):
-        """Icon to use in the frontend, if any."""
-        return ICON
-
     def update(self) -> None:
         """Get the latest data from rejseplanen.dk and update the states."""
         self.data.update()
diff --git a/homeassistant/components/simulated/sensor.py b/homeassistant/components/simulated/sensor.py
index f2e64655acc..0f9db48e78c 100644
--- a/homeassistant/components/simulated/sensor.py
+++ b/homeassistant/components/simulated/sensor.py
@@ -34,8 +34,6 @@ DEFAULT_SEED = 999
 DEFAULT_UNIT = "value"
 DEFAULT_RELATIVE_TO_EPOCH = True
 
-ICON = "mdi:chart-line"
-
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
     {
         vol.Optional(CONF_AMP, default=DEFAULT_AMP): vol.Coerce(float),
@@ -79,6 +77,8 @@ def setup_platform(
 class SimulatedSensor(SensorEntity):
     """Class for simulated sensor."""
 
+    _attr_icon = "mdi:chart-line"
+
     def __init__(
         self, name, unit, amp, mean, period, phase, fwhm, seed, relative_to_epoch
     ):
@@ -135,11 +135,6 @@ class SimulatedSensor(SensorEntity):
         """Return the state of the sensor."""
         return self._state
 
-    @property
-    def icon(self):
-        """Icon to use in the frontend, if any."""
-        return ICON
-
     @property
     def native_unit_of_measurement(self):
         """Return the unit this state is expressed in."""
diff --git a/homeassistant/components/smappee/switch.py b/homeassistant/components/smappee/switch.py
index b179daaf1a8..828e4a68121 100644
--- a/homeassistant/components/smappee/switch.py
+++ b/homeassistant/components/smappee/switch.py
@@ -10,7 +10,6 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from .const import DOMAIN
 
 SWITCH_PREFIX = "Switch"
-ICON = "mdi:toggle-switch"
 
 
 async def async_setup_entry(
@@ -55,6 +54,8 @@ async def async_setup_entry(
 class SmappeeActuator(SwitchEntity):
     """Representation of a Smappee Comport Plug."""
 
+    _attr_icon = "mdi:toggle-switch"
+
     def __init__(
         self,
         smappee_base,
@@ -105,11 +106,6 @@ class SmappeeActuator(SwitchEntity):
         # Switch or comfort plug
         return self._state == "ON_ON"
 
-    @property
-    def icon(self):
-        """Icon to use in the frontend."""
-        return ICON
-
     def turn_on(self, **kwargs: Any) -> None:
         """Turn on Comport Plug."""
         if self._actuator_type in ("SWITCH", "COMFORT_PLUG"):
diff --git a/homeassistant/components/srp_energy/const.py b/homeassistant/components/srp_energy/const.py
index 527a1ed78b1..cbc70786166 100644
--- a/homeassistant/components/srp_energy/const.py
+++ b/homeassistant/components/srp_energy/const.py
@@ -6,10 +6,8 @@ DEFAULT_NAME = "SRP Energy"
 
 CONF_IS_TOU = "is_tou"
 
-ATTRIBUTION = "Powered by SRP Energy"
+
 MIN_TIME_BETWEEN_UPDATES = timedelta(seconds=1440)
 
 SENSOR_NAME = "Usage"
 SENSOR_TYPE = "usage"
-
-ICON = "mdi:flash"
diff --git a/homeassistant/components/srp_energy/sensor.py b/homeassistant/components/srp_energy/sensor.py
index 1aaf5175e53..a919bba1b22 100644
--- a/homeassistant/components/srp_energy/sensor.py
+++ b/homeassistant/components/srp_energy/sensor.py
@@ -17,9 +17,7 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
 
 from .const import (
-    ATTRIBUTION,
     DEFAULT_NAME,
-    ICON,
     MIN_TIME_BETWEEN_UPDATES,
     SENSOR_NAME,
     SENSOR_TYPE,
@@ -83,7 +81,8 @@ async def async_setup_entry(
 class SrpEntity(SensorEntity):
     """Implementation of a Srp Energy Usage sensor."""
 
-    _attr_attribution = ATTRIBUTION
+    _attr_attribution = "Powered by SRP Energy"
+    _attr_icon = "mdi:flash"
     _attr_should_poll = False
 
     def __init__(self, coordinator):
@@ -116,11 +115,6 @@ class SrpEntity(SensorEntity):
         """Return the unit of measurement of this entity, if any."""
         return self._unit_of_measurement
 
-    @property
-    def icon(self):
-        """Return icon."""
-        return ICON
-
     @property
     def usage(self):
         """Return entity state."""
diff --git a/homeassistant/components/starlingbank/sensor.py b/homeassistant/components/starlingbank/sensor.py
index 350c420d5d6..f4a87837878 100644
--- a/homeassistant/components/starlingbank/sensor.py
+++ b/homeassistant/components/starlingbank/sensor.py
@@ -26,7 +26,7 @@ CONF_SANDBOX = "sandbox"
 DEFAULT_SANDBOX = False
 DEFAULT_ACCOUNT_NAME = "Starling"
 
-ICON = "mdi:currency-gbp"
+
 SCAN_INTERVAL = timedelta(seconds=180)
 
 ACCOUNT_SCHEMA = vol.Schema(
@@ -76,6 +76,8 @@ def setup_platform(
 class StarlingBalanceSensor(SensorEntity):
     """Representation of a Starling balance sensor."""
 
+    _attr_icon = "mdi:currency-gbp"
+
     def __init__(self, starling_account, account_name, balance_data_type):
         """Initialize the sensor."""
         self._starling_account = starling_account
@@ -100,11 +102,6 @@ class StarlingBalanceSensor(SensorEntity):
         """Return the unit of measurement."""
         return self._starling_account.currency
 
-    @property
-    def icon(self):
-        """Return the entity icon."""
-        return ICON
-
     def update(self) -> None:
         """Fetch new state data for the sensor."""
         self._starling_account.update_balance_data()
diff --git a/homeassistant/components/swiss_public_transport/sensor.py b/homeassistant/components/swiss_public_transport/sensor.py
index 8735726f892..12007e1741c 100644
--- a/homeassistant/components/swiss_public_transport/sensor.py
+++ b/homeassistant/components/swiss_public_transport/sensor.py
@@ -35,7 +35,6 @@ CONF_START = "from"
 
 DEFAULT_NAME = "Next Departure"
 
-ICON = "mdi:bus"
 
 SCAN_INTERVAL = timedelta(seconds=90)
 
@@ -79,6 +78,7 @@ class SwissPublicTransportSensor(SensorEntity):
     """Implementation of an Swiss public transport sensor."""
 
     _attr_attribution = "Data provided by transport.opendata.ch"
+    _attr_icon = "mdi:bus"
 
     def __init__(self, opendata, start, destination, name):
         """Initialize the sensor."""
@@ -125,11 +125,6 @@ class SwissPublicTransportSensor(SensorEntity):
             ATTR_DELAY: self._opendata.connections[0]["delay"],
         }
 
-    @property
-    def icon(self):
-        """Icon to use in the frontend, if any."""
-        return ICON
-
     async def async_update(self) -> None:
         """Get the latest data from opendata.ch and update the states."""
 
diff --git a/homeassistant/components/tmb/sensor.py b/homeassistant/components/tmb/sensor.py
index dd94b4c11b7..7fe8630cc98 100644
--- a/homeassistant/components/tmb/sensor.py
+++ b/homeassistant/components/tmb/sensor.py
@@ -18,8 +18,6 @@ from homeassistant.util import Throttle
 
 _LOGGER = logging.getLogger(__name__)
 
-ICON = "mdi:bus-clock"
-
 CONF_APP_ID = "app_id"
 CONF_APP_KEY = "app_key"
 CONF_LINE = "line"
@@ -74,6 +72,7 @@ class TMBSensor(SensorEntity):
     """Implementation of a TMB line/stop Sensor."""
 
     _attr_attribution = "Data provided by Transport Metropolitans de Barcelona"
+    _attr_icon = "mdi:bus-clock"
 
     def __init__(self, ibus_client, stop, line, name):
         """Initialize the sensor."""
@@ -89,11 +88,6 @@ class TMBSensor(SensorEntity):
         """Return the name of the sensor."""
         return self._name
 
-    @property
-    def icon(self):
-        """Return the icon for the frontend."""
-        return ICON
-
     @property
     def native_unit_of_measurement(self):
         """Return the unit of measurement."""
diff --git a/homeassistant/components/utility_meter/sensor.py b/homeassistant/components/utility_meter/sensor.py
index dad2d8dfaf3..dd0fb685bac 100644
--- a/homeassistant/components/utility_meter/sensor.py
+++ b/homeassistant/components/utility_meter/sensor.py
@@ -94,7 +94,6 @@ DEVICE_CLASS_MAP = {
     UnitOfEnergy.KILO_WATT_HOUR: SensorDeviceClass.ENERGY,
 }
 
-ICON = "mdi:counter"
 
 PRECISION = 3
 PAUSED = "paused"
@@ -323,6 +322,7 @@ class UtilitySensorExtraStoredData(SensorExtraStoredData):
 class UtilityMeterSensor(RestoreSensor):
     """Representation of an utility meter sensor."""
 
+    _attr_icon = "mdi:counter"
     _attr_should_poll = False
 
     def __init__(
@@ -659,11 +659,6 @@ class UtilityMeterSensor(RestoreSensor):
 
         return state_attr
 
-    @property
-    def icon(self):
-        """Return the icon to use in the frontend, if any."""
-        return ICON
-
     @property
     def extra_restore_state_data(self) -> UtilitySensorExtraStoredData:
         """Return sensor specific state data to be restored."""
diff --git a/homeassistant/components/vasttrafik/sensor.py b/homeassistant/components/vasttrafik/sensor.py
index 118d04d3c1b..711f66ea033 100644
--- a/homeassistant/components/vasttrafik/sensor.py
+++ b/homeassistant/components/vasttrafik/sensor.py
@@ -32,7 +32,6 @@ CONF_SECRET = "secret"
 
 DEFAULT_DELAY = 0
 
-ICON = "mdi:train"
 
 MIN_TIME_BETWEEN_UPDATES = timedelta(seconds=120)
 
@@ -83,6 +82,7 @@ class VasttrafikDepartureSensor(SensorEntity):
     """Implementation of a Vasttrafik Departure Sensor."""
 
     _attr_attribution = "Data provided by Västtrafik"
+    _attr_icon = "mdi:train"
 
     def __init__(self, planner, name, departure, heading, lines, delay):
         """Initialize the sensor."""
@@ -110,11 +110,6 @@ class VasttrafikDepartureSensor(SensorEntity):
         """Return the name of the sensor."""
         return self._name
 
-    @property
-    def icon(self):
-        """Return the icon for the frontend."""
-        return ICON
-
     @property
     def extra_state_attributes(self):
         """Return the state attributes."""
diff --git a/homeassistant/components/xbox_live/sensor.py b/homeassistant/components/xbox_live/sensor.py
index d95031a646e..2ad3f75468c 100644
--- a/homeassistant/components/xbox_live/sensor.py
+++ b/homeassistant/components/xbox_live/sensor.py
@@ -20,7 +20,6 @@ _LOGGER = logging.getLogger(__name__)
 
 CONF_XUID = "xuid"
 
-ICON = "mdi:microsoft-xbox"
 
 PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
     {
@@ -98,6 +97,7 @@ def get_user_gamercard(api, xuid):
 class XboxSensor(SensorEntity):
     """A class for the Xbox account."""
 
+    _attr_icon = "mdi:microsoft-xbox"
     _attr_should_poll = False
 
     def __init__(self, api, xuid, gamercard, interval):
@@ -138,11 +138,6 @@ class XboxSensor(SensorEntity):
         """Avatar of the account."""
         return self._picture
 
-    @property
-    def icon(self):
-        """Return the icon to use in the frontend."""
-        return ICON
-
     async def async_added_to_hass(self) -> None:
         """Start custom polling."""
 
diff --git a/homeassistant/components/yandex_transport/sensor.py b/homeassistant/components/yandex_transport/sensor.py
index d3e7e48815c..1fbae6c88a6 100644
--- a/homeassistant/components/yandex_transport/sensor.py
+++ b/homeassistant/components/yandex_transport/sensor.py
@@ -29,7 +29,7 @@ CONF_STOP_ID = "stop_id"
 CONF_ROUTE = "routes"
 
 DEFAULT_NAME = "Yandex Transport"
-ICON = "mdi:bus"
+
 
 SCAN_INTERVAL = timedelta(minutes=1)
 
@@ -70,6 +70,7 @@ class DiscoverYandexTransport(SensorEntity):
     """Implementation of yandex_transport sensor."""
 
     _attr_attribution = "Data provided by maps.yandex.ru"
+    _attr_icon = "mdi:bus"
 
     def __init__(self, requester: YandexMapsRequester, stop_id, routes, name) -> None:
         """Initialize sensor."""
@@ -168,8 +169,3 @@ class DiscoverYandexTransport(SensorEntity):
     def extra_state_attributes(self):
         """Return the state attributes."""
         return self._attrs
-
-    @property
-    def icon(self):
-        """Icon to use in the frontend, if any."""
-        return ICON
diff --git a/homeassistant/components/zestimate/sensor.py b/homeassistant/components/zestimate/sensor.py
index 3c6b7c7186d..9b520c46819 100644
--- a/homeassistant/components/zestimate/sensor.py
+++ b/homeassistant/components/zestimate/sensor.py
@@ -24,7 +24,6 @@ DEFAULT_NAME = "Zestimate"
 NAME = "zestimate"
 ZESTIMATE = f"{DEFAULT_NAME}:{NAME}"
 
-ICON = "mdi:home-variant"
 
 ATTR_AMOUNT = "amount"
 ATTR_CHANGE = "amount_change_30_days"
@@ -67,6 +66,7 @@ class ZestimateDataSensor(SensorEntity):
     """Implementation of a Zestimate sensor."""
 
     _attr_attribution = "Data provided by Zillow.com"
+    _attr_icon = "mdi:home-variant"
 
     def __init__(self, name, params):
         """Initialize the sensor."""
@@ -103,11 +103,6 @@ class ZestimateDataSensor(SensorEntity):
         attributes["address"] = self.address
         return attributes
 
-    @property
-    def icon(self):
-        """Icon to use in the frontend, if any."""
-        return ICON
-
     def update(self):
         """Get the latest data and update the states."""
 
diff --git a/tests/components/srp_energy/test_sensor.py b/tests/components/srp_energy/test_sensor.py
index 44930886065..0f59474ffb1 100644
--- a/tests/components/srp_energy/test_sensor.py
+++ b/tests/components/srp_energy/test_sensor.py
@@ -3,9 +3,7 @@ from unittest.mock import MagicMock
 
 from homeassistant.components.sensor import SensorDeviceClass, SensorStateClass
 from homeassistant.components.srp_energy.const import (
-    ATTRIBUTION,
     DEFAULT_NAME,
-    ICON,
     SENSOR_NAME,
     SENSOR_TYPE,
     SRP_ENERGY_DOMAIN,
@@ -91,10 +89,10 @@ async def test_srp_entity(hass: HomeAssistant) -> None:
     assert srp_entity.unique_id == SENSOR_TYPE
     assert srp_entity.state is None
     assert srp_entity.unit_of_measurement == UnitOfEnergy.KILO_WATT_HOUR
-    assert srp_entity.icon == ICON
+    assert srp_entity.icon == "mdi:flash"
     assert srp_entity.usage == "2.00"
     assert srp_entity.should_poll is False
-    assert srp_entity.attribution == ATTRIBUTION
+    assert srp_entity.attribution == "Powered by SRP Energy"
     assert srp_entity.available is not None
     assert srp_entity.device_class is SensorDeviceClass.ENERGY
     assert srp_entity.state_class is SensorStateClass.TOTAL_INCREASING