diff --git a/homeassistant/components/group/__init__.py b/homeassistant/components/group/__init__.py
index 4bdabdf9c962..33df9822ac2b 100644
--- a/homeassistant/components/group/__init__.py
+++ b/homeassistant/components/group/__init__.py
@@ -28,7 +28,6 @@ from homeassistant.const import (
 )
 from homeassistant.core import (
     CALLBACK_TYPE,
-    Event,
     HomeAssistant,
     ServiceCall,
     State,
@@ -38,13 +37,16 @@ from homeassistant.core import (
 from homeassistant.helpers import config_validation as cv, entity_registry as er, start
 from homeassistant.helpers.entity import Entity, async_generate_entity_id
 from homeassistant.helpers.entity_component import EntityComponent
-from homeassistant.helpers.event import async_track_state_change_event
+from homeassistant.helpers.event import (
+    EventStateChangedData,
+    async_track_state_change_event,
+)
 from homeassistant.helpers.integration_platform import (
     async_process_integration_platform_for_component,
     async_process_integration_platforms,
 )
 from homeassistant.helpers.reload import async_reload_integration_platforms
-from homeassistant.helpers.typing import ConfigType
+from homeassistant.helpers.typing import ConfigType, EventType
 from homeassistant.loader import bind_hass
 
 from .const import CONF_HIDE_MEMBERS
@@ -737,7 +739,9 @@ class Group(Entity):
         """Handle removal from Home Assistant."""
         self._async_stop()
 
-    async def _async_state_changed_listener(self, event: Event) -> None:
+    async def _async_state_changed_listener(
+        self, event: EventType[EventStateChangedData]
+    ) -> None:
         """Respond to a member state changing.
 
         This method must be run in the event loop.
@@ -748,7 +752,7 @@ class Group(Entity):
 
         self.async_set_context(event.context)
 
-        if (new_state := event.data.get("new_state")) is None:
+        if (new_state := event.data["new_state"]) is None:
             # The state was removed from the state machine
             self._reset_tracked_state()
 
diff --git a/homeassistant/components/group/binary_sensor.py b/homeassistant/components/group/binary_sensor.py
index 112b111bdca5..7415ee8c60d3 100644
--- a/homeassistant/components/group/binary_sensor.py
+++ b/homeassistant/components/group/binary_sensor.py
@@ -21,11 +21,14 @@ from homeassistant.const import (
     STATE_UNAVAILABLE,
     STATE_UNKNOWN,
 )
-from homeassistant.core import Event, HomeAssistant, callback
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import config_validation as cv, entity_registry as er
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.helpers.event import async_track_state_change_event
-from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
+from homeassistant.helpers.event import (
+    EventStateChangedData,
+    async_track_state_change_event,
+)
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType, EventType
 
 from . import GroupEntity
 
@@ -114,7 +117,9 @@ class BinarySensorGroup(GroupEntity, BinarySensorEntity):
         """Register callbacks."""
 
         @callback
-        def async_state_changed_listener(event: Event) -> None:
+        def async_state_changed_listener(
+            event: EventType[EventStateChangedData],
+        ) -> None:
             """Handle child updates."""
             self.async_set_context(event.context)
             self.async_defer_or_update_ha_state()
diff --git a/homeassistant/components/group/cover.py b/homeassistant/components/group/cover.py
index 38928302eb11..784ac9a94af2 100644
--- a/homeassistant/components/group/cover.py
+++ b/homeassistant/components/group/cover.py
@@ -38,11 +38,14 @@ from homeassistant.const import (
     STATE_UNAVAILABLE,
     STATE_UNKNOWN,
 )
-from homeassistant.core import Event, HomeAssistant, State, callback
+from homeassistant.core import HomeAssistant, State, callback
 from homeassistant.helpers import config_validation as cv, entity_registry as er
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.helpers.event import async_track_state_change_event
-from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
+from homeassistant.helpers.event import (
+    EventStateChangedData,
+    async_track_state_change_event,
+)
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType, EventType
 
 from . import GroupEntity
 from .util import attribute_equal, reduce_attribute
@@ -126,10 +129,13 @@ class CoverGroup(GroupEntity, CoverEntity):
         self._attr_unique_id = unique_id
 
     @callback
-    def _update_supported_features_event(self, event: Event) -> None:
+    def _update_supported_features_event(
+        self, event: EventType[EventStateChangedData]
+    ) -> None:
         self.async_set_context(event.context)
-        if (entity := event.data.get("entity_id")) is not None:
-            self.async_update_supported_features(entity, event.data.get("new_state"))
+        self.async_update_supported_features(
+            event.data["entity_id"], event.data["new_state"]
+        )
 
     @callback
     def async_update_supported_features(
diff --git a/homeassistant/components/group/fan.py b/homeassistant/components/group/fan.py
index 0c4c59d24545..1fcb859f9269 100644
--- a/homeassistant/components/group/fan.py
+++ b/homeassistant/components/group/fan.py
@@ -35,11 +35,14 @@ from homeassistant.const import (
     STATE_UNAVAILABLE,
     STATE_UNKNOWN,
 )
-from homeassistant.core import Event, HomeAssistant, State, callback
+from homeassistant.core import HomeAssistant, State, callback
 from homeassistant.helpers import config_validation as cv, entity_registry as er
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.helpers.event import async_track_state_change_event
-from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
+from homeassistant.helpers.event import (
+    EventStateChangedData,
+    async_track_state_change_event,
+)
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType, EventType
 
 from . import GroupEntity
 from .util import (
@@ -142,10 +145,13 @@ class FanGroup(GroupEntity, FanEntity):
         return self._oscillating
 
     @callback
-    def _update_supported_features_event(self, event: Event) -> None:
+    def _update_supported_features_event(
+        self, event: EventType[EventStateChangedData]
+    ) -> None:
         self.async_set_context(event.context)
-        if (entity := event.data.get("entity_id")) is not None:
-            self.async_update_supported_features(entity, event.data.get("new_state"))
+        self.async_update_supported_features(
+            event.data["entity_id"], event.data["new_state"]
+        )
 
     @callback
     def async_update_supported_features(
diff --git a/homeassistant/components/group/light.py b/homeassistant/components/group/light.py
index 33d240a9a4d1..e0f7974631b9 100644
--- a/homeassistant/components/group/light.py
+++ b/homeassistant/components/group/light.py
@@ -44,11 +44,14 @@ from homeassistant.const import (
     STATE_UNAVAILABLE,
     STATE_UNKNOWN,
 )
-from homeassistant.core import Event, HomeAssistant, callback
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import config_validation as cv, entity_registry as er
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.helpers.event import async_track_state_change_event
-from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
+from homeassistant.helpers.event import (
+    EventStateChangedData,
+    async_track_state_change_event,
+)
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType, EventType
 
 from . import GroupEntity
 from .util import find_state_attributes, mean_tuple, reduce_attribute
@@ -154,7 +157,9 @@ class LightGroup(GroupEntity, LightEntity):
         """Register callbacks."""
 
         @callback
-        def async_state_changed_listener(event: Event) -> None:
+        def async_state_changed_listener(
+            event: EventType[EventStateChangedData],
+        ) -> None:
             """Handle child updates."""
             self.async_set_context(event.context)
             self.async_defer_or_update_ha_state()
diff --git a/homeassistant/components/group/lock.py b/homeassistant/components/group/lock.py
index 07d08c7851d5..233d1155c53f 100644
--- a/homeassistant/components/group/lock.py
+++ b/homeassistant/components/group/lock.py
@@ -28,11 +28,14 @@ from homeassistant.const import (
     STATE_UNKNOWN,
     STATE_UNLOCKING,
 )
-from homeassistant.core import Event, HomeAssistant, callback
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import config_validation as cv, entity_registry as er
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.helpers.event import async_track_state_change_event
-from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
+from homeassistant.helpers.event import (
+    EventStateChangedData,
+    async_track_state_change_event,
+)
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType, EventType
 
 from . import GroupEntity
 
@@ -115,7 +118,9 @@ class LockGroup(GroupEntity, LockEntity):
         """Register callbacks."""
 
         @callback
-        def async_state_changed_listener(event: Event) -> None:
+        def async_state_changed_listener(
+            event: EventType[EventStateChangedData],
+        ) -> None:
             """Handle child updates."""
             self.async_set_context(event.context)
             self.async_defer_or_update_ha_state()
diff --git a/homeassistant/components/group/media_player.py b/homeassistant/components/group/media_player.py
index ad375630beae..f0d076ec1302 100644
--- a/homeassistant/components/group/media_player.py
+++ b/homeassistant/components/group/media_player.py
@@ -44,11 +44,14 @@ from homeassistant.const import (
     STATE_UNAVAILABLE,
     STATE_UNKNOWN,
 )
-from homeassistant.core import Event, HomeAssistant, State, callback
+from homeassistant.core import HomeAssistant, State, callback
 from homeassistant.helpers import config_validation as cv, entity_registry as er
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.helpers.event import async_track_state_change_event
-from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
+from homeassistant.helpers.event import (
+    EventStateChangedData,
+    async_track_state_change_event,
+)
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType, EventType
 
 KEY_ANNOUNCE = "announce"
 KEY_CLEAR_PLAYLIST = "clear_playlist"
@@ -130,11 +133,11 @@ class MediaPlayerGroup(MediaPlayerEntity):
         }
 
     @callback
-    def async_on_state_change(self, event: Event) -> None:
+    def async_on_state_change(self, event: EventType[EventStateChangedData]) -> None:
         """Update supported features and state when a new state is received."""
         self.async_set_context(event.context)
         self.async_update_supported_features(
-            event.data.get("entity_id"), event.data.get("new_state")  # type: ignore[arg-type]
+            event.data["entity_id"], event.data["new_state"]
         )
         self.async_update_state()
 
diff --git a/homeassistant/components/group/sensor.py b/homeassistant/components/group/sensor.py
index 4c6e8dccc1eb..d62447d99478 100644
--- a/homeassistant/components/group/sensor.py
+++ b/homeassistant/components/group/sensor.py
@@ -33,11 +33,19 @@ from homeassistant.const import (
     STATE_UNAVAILABLE,
     STATE_UNKNOWN,
 )
-from homeassistant.core import Event, HomeAssistant, State, callback
+from homeassistant.core import HomeAssistant, State, callback
 from homeassistant.helpers import config_validation as cv, entity_registry as er
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.helpers.event import async_track_state_change_event
-from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType, StateType
+from homeassistant.helpers.event import (
+    EventStateChangedData,
+    async_track_state_change_event,
+)
+from homeassistant.helpers.typing import (
+    ConfigType,
+    DiscoveryInfoType,
+    EventType,
+    StateType,
+)
 
 from . import GroupEntity
 from .const import CONF_IGNORE_NON_NUMERIC
@@ -299,7 +307,9 @@ class SensorGroup(GroupEntity, SensorEntity):
         """Register callbacks."""
 
         @callback
-        def async_state_changed_listener(event: Event) -> None:
+        def async_state_changed_listener(
+            event: EventType[EventStateChangedData],
+        ) -> None:
             """Handle child updates."""
             self.async_set_context(event.context)
             self.async_defer_or_update_ha_state()
diff --git a/homeassistant/components/group/switch.py b/homeassistant/components/group/switch.py
index 4b6b959ba17a..f62c805ba1d7 100644
--- a/homeassistant/components/group/switch.py
+++ b/homeassistant/components/group/switch.py
@@ -19,11 +19,14 @@ from homeassistant.const import (
     STATE_UNAVAILABLE,
     STATE_UNKNOWN,
 )
-from homeassistant.core import Event, HomeAssistant, callback
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import config_validation as cv, entity_registry as er
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.helpers.event import async_track_state_change_event
-from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
+from homeassistant.helpers.event import (
+    EventStateChangedData,
+    async_track_state_change_event,
+)
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType, EventType
 
 from . import GroupEntity
 
@@ -113,7 +116,9 @@ class SwitchGroup(GroupEntity, SwitchEntity):
         """Register callbacks."""
 
         @callback
-        def async_state_changed_listener(event: Event) -> None:
+        def async_state_changed_listener(
+            event: EventType[EventStateChangedData],
+        ) -> None:
             """Handle child updates."""
             self.async_set_context(event.context)
             self.async_defer_or_update_ha_state()
diff --git a/homeassistant/components/history/websocket_api.py b/homeassistant/components/history/websocket_api.py
index 93a5d2729652..24ec07b6a878 100644
--- a/homeassistant/components/history/websocket_api.py
+++ b/homeassistant/components/history/websocket_api.py
@@ -30,10 +30,12 @@ from homeassistant.core import (
     valid_entity_id,
 )
 from homeassistant.helpers.event import (
+    EventStateChangedData,
     async_track_point_in_utc_time,
     async_track_state_change_event,
 )
 from homeassistant.helpers.json import JSON_DUMP
+from homeassistant.helpers.typing import EventType
 import homeassistant.util.dt as dt_util
 
 from .const import EVENT_COALESCE_TIME, MAX_PENDING_HISTORY_STATES
@@ -373,14 +375,12 @@ def _async_subscribe_events(
     assert is_callback(target), "target must be a callback"
 
     @callback
-    def _forward_state_events_filtered(event: Event) -> None:
+    def _forward_state_events_filtered(event: EventType[EventStateChangedData]) -> None:
         """Filter state events and forward them."""
-        if (new_state := event.data.get("new_state")) is None or (
-            old_state := event.data.get("old_state")
+        if (new_state := event.data["new_state"]) is None or (
+            old_state := event.data["old_state"]
         ) is None:
             return
-        assert isinstance(new_state, State)
-        assert isinstance(old_state, State)
         if (
             (significant_changes_only or minimal_response)
             and new_state.state == old_state.state
diff --git a/homeassistant/components/logbook/helpers.py b/homeassistant/components/logbook/helpers.py
index 3a1ec971b54e..c2ea98235358 100644
--- a/homeassistant/components/logbook/helpers.py
+++ b/homeassistant/components/logbook/helpers.py
@@ -23,7 +23,11 @@ from homeassistant.core import (
     split_entity_id,
 )
 from homeassistant.helpers import device_registry as dr, entity_registry as er
-from homeassistant.helpers.event import async_track_state_change_event
+from homeassistant.helpers.event import (
+    EventStateChangedData,
+    async_track_state_change_event,
+)
+from homeassistant.helpers.typing import EventType
 
 from .const import ALWAYS_CONTINUOUS_DOMAINS, AUTOMATION_EVENTS, BUILT_IN_EVENTS, DOMAIN
 from .models import LogbookConfig
@@ -184,11 +188,11 @@ def async_subscribe_events(
         return
 
     @callback
-    def _forward_state_events_filtered(event: Event) -> None:
-        if event.data.get("old_state") is None or event.data.get("new_state") is None:
+    def _forward_state_events_filtered(event: EventType[EventStateChangedData]) -> None:
+        if (old_state := event.data["old_state"]) is None or (
+            new_state := event.data["new_state"]
+        ) is None:
             return
-        new_state: State = event.data["new_state"]
-        old_state: State = event.data["old_state"]
         if _is_state_filtered(ent_reg, new_state, old_state) or (
             entities_filter and not entities_filter(new_state.entity_id)
         ):
@@ -207,7 +211,7 @@ def async_subscribe_events(
     subscriptions.append(
         hass.bus.async_listen(
             EVENT_STATE_CHANGED,
-            _forward_state_events_filtered,
+            _forward_state_events_filtered,  # type: ignore[arg-type]
             run_immediately=True,
         )
     )
diff --git a/homeassistant/components/switch/light.py b/homeassistant/components/switch/light.py
index fd2a5afff1c6..ffd345cea3bf 100644
--- a/homeassistant/components/switch/light.py
+++ b/homeassistant/components/switch/light.py
@@ -15,12 +15,15 @@ from homeassistant.const import (
     STATE_ON,
     STATE_UNAVAILABLE,
 )
-from homeassistant.core import Event, HomeAssistant, callback
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import entity_registry as er
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-from homeassistant.helpers.event import async_track_state_change_event
-from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
+from homeassistant.helpers.event import (
+    EventStateChangedData,
+    async_track_state_change_event,
+)
+from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType, EventType
 
 from .const import DOMAIN as SWITCH_DOMAIN
 
@@ -93,7 +96,9 @@ class LightSwitch(LightEntity):
         """Register callbacks."""
 
         @callback
-        def async_state_changed_listener(event: Event | None = None) -> None:
+        def async_state_changed_listener(
+            event: EventType[EventStateChangedData] | None = None,
+        ) -> None:
             """Handle child updates."""
             if (
                 state := self.hass.states.get(self._switch_entity_id)
diff --git a/homeassistant/components/zone/trigger.py b/homeassistant/components/zone/trigger.py
index 54a2784467df..9412c612ca29 100644
--- a/homeassistant/components/zone/trigger.py
+++ b/homeassistant/components/zone/trigger.py
@@ -14,10 +14,8 @@ from homeassistant.const import (
 )
 from homeassistant.core import (
     CALLBACK_TYPE,
-    Event,
     HassJob,
     HomeAssistant,
-    State,
     callback,
 )
 from homeassistant.helpers import (
@@ -26,9 +24,12 @@ from homeassistant.helpers import (
     entity_registry as er,
     location,
 )
-from homeassistant.helpers.event import async_track_state_change_event
+from homeassistant.helpers.event import (
+    EventStateChangedData,
+    async_track_state_change_event,
+)
 from homeassistant.helpers.trigger import TriggerActionType, TriggerInfo
-from homeassistant.helpers.typing import ConfigType
+from homeassistant.helpers.typing import ConfigType, EventType
 
 EVENT_ENTER = "enter"
 EVENT_LEAVE = "leave"
@@ -78,11 +79,11 @@ async def async_attach_trigger(
     job = HassJob(action)
 
     @callback
-    def zone_automation_listener(zone_event: Event) -> None:
+    def zone_automation_listener(zone_event: EventType[EventStateChangedData]) -> None:
         """Listen for state changes and calls action."""
-        entity = zone_event.data.get("entity_id")
-        from_s: State | None = zone_event.data.get("old_state")
-        to_s: State | None = zone_event.data.get("new_state")
+        entity = zone_event.data["entity_id"]
+        from_s = zone_event.data["old_state"]
+        to_s = zone_event.data["new_state"]
 
         if (
             from_s
diff --git a/tests/helpers/test_event.py b/tests/helpers/test_event.py
index 3740a6b177a2..434957dc1319 100644
--- a/tests/helpers/test_event.py
+++ b/tests/helpers/test_event.py
@@ -21,6 +21,7 @@ from homeassistant.exceptions import TemplateError
 from homeassistant.helpers.device_registry import EVENT_DEVICE_REGISTRY_UPDATED
 from homeassistant.helpers.entity_registry import EVENT_ENTITY_REGISTRY_UPDATED
 from homeassistant.helpers.event import (
+    EventStateChangedData,
     TrackStates,
     TrackTemplate,
     TrackTemplateResult,
@@ -45,6 +46,7 @@ from homeassistant.helpers.event import (
     track_point_in_utc_time,
 )
 from homeassistant.helpers.template import Template, result_as_boolean
+from homeassistant.helpers.typing import EventType
 from homeassistant.setup import async_setup_component
 import homeassistant.util.dt as dt_util
 
@@ -434,21 +436,21 @@ async def test_async_track_state_change_event(hass: HomeAssistant) -> None:
     multiple_entity_id_tracker = []
 
     @ha.callback
-    def single_run_callback(event):
-        old_state = event.data.get("old_state")
-        new_state = event.data.get("new_state")
+    def single_run_callback(event: EventType[EventStateChangedData]) -> None:
+        old_state = event.data["old_state"]
+        new_state = event.data["new_state"]
 
         single_entity_id_tracker.append((old_state, new_state))
 
     @ha.callback
-    def multiple_run_callback(event):
-        old_state = event.data.get("old_state")
-        new_state = event.data.get("new_state")
+    def multiple_run_callback(event: EventType[EventStateChangedData]) -> None:
+        old_state = event.data["old_state"]
+        new_state = event.data["new_state"]
 
         multiple_entity_id_tracker.append((old_state, new_state))
 
     @ha.callback
-    def callback_that_throws(event):
+    def callback_that_throws(event: EventType[EventStateChangedData]) -> None:
         raise ValueError
 
     unsub_single = async_track_state_change_event(
@@ -4302,16 +4304,16 @@ async def test_track_state_change_event_chain_multple_entity(
     tracker_unsub = []
 
     @ha.callback
-    def chained_single_run_callback(event):
-        old_state = event.data.get("old_state")
-        new_state = event.data.get("new_state")
+    def chained_single_run_callback(event: EventType[EventStateChangedData]) -> None:
+        old_state = event.data["old_state"]
+        new_state = event.data["new_state"]
 
         chained_tracker_called.append((old_state, new_state))
 
     @ha.callback
-    def single_run_callback(event):
-        old_state = event.data.get("old_state")
-        new_state = event.data.get("new_state")
+    def single_run_callback(event: EventType[EventStateChangedData]) -> None:
+        old_state = event.data["old_state"]
+        new_state = event.data["new_state"]
 
         tracker_called.append((old_state, new_state))
 
@@ -4356,16 +4358,16 @@ async def test_track_state_change_event_chain_single_entity(
     tracker_unsub = []
 
     @ha.callback
-    def chained_single_run_callback(event):
-        old_state = event.data.get("old_state")
-        new_state = event.data.get("new_state")
+    def chained_single_run_callback(event: EventType[EventStateChangedData]) -> None:
+        old_state = event.data["old_state"]
+        new_state = event.data["new_state"]
 
         chained_tracker_called.append((old_state, new_state))
 
     @ha.callback
-    def single_run_callback(event):
-        old_state = event.data.get("old_state")
-        new_state = event.data.get("new_state")
+    def single_run_callback(event: EventType[EventStateChangedData]) -> None:
+        old_state = event.data["old_state"]
+        new_state = event.data["new_state"]
 
         tracker_called.append((old_state, new_state))