diff --git a/.strict-typing b/.strict-typing
index e64a9a04931..45d11f089dd 100644
--- a/.strict-typing
+++ b/.strict-typing
@@ -152,6 +152,7 @@ homeassistant.components.laundrify.*
 homeassistant.components.lcn.*
 homeassistant.components.light.*
 homeassistant.components.lifx.*
+homeassistant.components.litterrobot.*
 homeassistant.components.local_ip.*
 homeassistant.components.lock.*
 homeassistant.components.logbook.*
diff --git a/homeassistant/components/litterrobot/__init__.py b/homeassistant/components/litterrobot/__init__.py
index a2612966a98..f3b150f2c1d 100644
--- a/homeassistant/components/litterrobot/__init__.py
+++ b/homeassistant/components/litterrobot/__init__.py
@@ -1,4 +1,5 @@
 """The Litter-Robot integration."""
+from __future__ import annotations
 
 from pylitterbot.exceptions import LitterRobotException, LitterRobotLoginException
 
diff --git a/homeassistant/components/litterrobot/config_flow.py b/homeassistant/components/litterrobot/config_flow.py
index c49d18c5257..fbe32fa9749 100644
--- a/homeassistant/components/litterrobot/config_flow.py
+++ b/homeassistant/components/litterrobot/config_flow.py
@@ -1,11 +1,16 @@
 """Config flow for Litter-Robot integration."""
+from __future__ import annotations
+
+from collections.abc import Mapping
 import logging
+from typing import Any
 
 from pylitterbot.exceptions import LitterRobotException, LitterRobotLoginException
 import voluptuous as vol
 
 from homeassistant import config_entries
 from homeassistant.const import CONF_PASSWORD, CONF_USERNAME
+from homeassistant.data_entry_flow import FlowResult
 
 from .const import DOMAIN
 from .hub import LitterRobotHub
@@ -22,7 +27,9 @@ class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     VERSION = 1
 
-    async def async_step_user(self, user_input=None):
+    async def async_step_user(
+        self, user_input: Mapping[str, Any] | None = None
+    ) -> FlowResult:
         """Handle the initial step."""
         errors = {}
 
diff --git a/homeassistant/components/litterrobot/entity.py b/homeassistant/components/litterrobot/entity.py
index 51b88bb4f79..501b71fbd06 100644
--- a/homeassistant/components/litterrobot/entity.py
+++ b/homeassistant/components/litterrobot/entity.py
@@ -1,29 +1,35 @@
 """Litter-Robot entities for common data and methods."""
 from __future__ import annotations
 
+from collections.abc import Callable, Coroutine
 from datetime import time
 import logging
-from types import MethodType
 from typing import Any
 
 from pylitterbot import Robot
 from pylitterbot.exceptions import InvalidCommandException
+from typing_extensions import ParamSpec
 
 from homeassistant.core import CALLBACK_TYPE, callback
 from homeassistant.helpers.entity import DeviceInfo, EntityCategory
 from homeassistant.helpers.event import async_call_later
-from homeassistant.helpers.update_coordinator import CoordinatorEntity
+from homeassistant.helpers.update_coordinator import (
+    CoordinatorEntity,
+    DataUpdateCoordinator,
+)
 import homeassistant.util.dt as dt_util
 
 from .const import DOMAIN
 from .hub import LitterRobotHub
 
+_P = ParamSpec("_P")
+
 _LOGGER = logging.getLogger(__name__)
 
 REFRESH_WAIT_TIME_SECONDS = 8
 
 
-class LitterRobotEntity(CoordinatorEntity):
+class LitterRobotEntity(CoordinatorEntity[DataUpdateCoordinator[bool]]):
     """Generic Litter-Robot entity representing common data and methods."""
 
     def __init__(self, robot: Robot, entity_type: str, hub: LitterRobotHub) -> None:
@@ -63,7 +69,10 @@ class LitterRobotControlEntity(LitterRobotEntity):
         self._refresh_callback: CALLBACK_TYPE | None = None
 
     async def perform_action_and_refresh(
-        self, action: MethodType, *args: Any, **kwargs: Any
+        self,
+        action: Callable[_P, Coroutine[Any, Any, bool]],
+        *args: _P.args,
+        **kwargs: _P.kwargs,
     ) -> bool:
         """Perform an action and initiates a refresh of the robot data after a few seconds."""
         success = False
@@ -82,7 +91,7 @@ class LitterRobotControlEntity(LitterRobotEntity):
             )
         return success
 
-    async def async_call_later_callback(self, *_) -> None:
+    async def async_call_later_callback(self, *_: Any) -> None:
         """Perform refresh request on callback."""
         self._refresh_callback = None
         await self.coordinator.async_request_refresh()
@@ -92,7 +101,7 @@ class LitterRobotControlEntity(LitterRobotEntity):
         self.async_cancel_refresh_callback()
 
     @callback
-    def async_cancel_refresh_callback(self):
+    def async_cancel_refresh_callback(self) -> None:
         """Clear the refresh callback if it has not already fired."""
         if self._refresh_callback is not None:
             self._refresh_callback()
@@ -126,10 +135,10 @@ class LitterRobotConfigEntity(LitterRobotControlEntity):
     def __init__(self, robot: Robot, entity_type: str, hub: LitterRobotHub) -> None:
         """Init a Litter-Robot control entity."""
         super().__init__(robot=robot, entity_type=entity_type, hub=hub)
-        self._assumed_state: Any = None
+        self._assumed_state: bool | None = None
 
     async def perform_action_and_assume_state(
-        self, action: MethodType, assumed_state: Any
+        self, action: Callable[[bool], Coroutine[Any, Any, bool]], assumed_state: bool
     ) -> None:
         """Perform an action and assume the state passed in if call is successful."""
         if await self.perform_action_and_refresh(action, assumed_state):
diff --git a/homeassistant/components/litterrobot/hub.py b/homeassistant/components/litterrobot/hub.py
index 43d60e534ea..bde4c780482 100644
--- a/homeassistant/components/litterrobot/hub.py
+++ b/homeassistant/components/litterrobot/hub.py
@@ -4,6 +4,7 @@ from __future__ import annotations
 from collections.abc import Mapping
 from datetime import timedelta
 import logging
+from typing import Any
 
 from pylitterbot import Account
 from pylitterbot.exceptions import LitterRobotException, LitterRobotLoginException
@@ -24,7 +25,7 @@ class LitterRobotHub:
 
     account: Account
 
-    def __init__(self, hass: HomeAssistant, data: Mapping) -> None:
+    def __init__(self, hass: HomeAssistant, data: Mapping[str, Any]) -> None:
         """Initialize the Litter-Robot hub."""
         self._data = data
 
diff --git a/homeassistant/components/litterrobot/sensor.py b/homeassistant/components/litterrobot/sensor.py
index 01deaa302cf..b6dd2a976c3 100644
--- a/homeassistant/components/litterrobot/sensor.py
+++ b/homeassistant/components/litterrobot/sensor.py
@@ -4,7 +4,7 @@ from __future__ import annotations
 from collections.abc import Callable
 from dataclasses import dataclass
 from datetime import datetime
-from typing import Any
+from typing import Any, Union, cast
 
 from pylitterbot.robot import Robot
 
@@ -12,7 +12,6 @@ from homeassistant.components.sensor import (
     SensorDeviceClass,
     SensorEntity,
     SensorEntityDescription,
-    StateType,
 )
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import PERCENTAGE
@@ -61,12 +60,12 @@ class LitterRobotSensorEntity(LitterRobotEntity, SensorEntity):
         self.entity_description = description
 
     @property
-    def native_value(self) -> StateType | datetime:
+    def native_value(self) -> float | datetime | str | None:
         """Return the state."""
         if self.entity_description.should_report(self.robot):
             if isinstance(val := getattr(self.robot, self.entity_description.key), str):
                 return val.lower()
-            return val
+            return cast(Union[float, datetime, None], val)
         return None
 
     @property
@@ -88,13 +87,13 @@ ROBOT_SENSORS = [
         name="Sleep Mode Start Time",
         key="sleep_mode_start_time",
         device_class=SensorDeviceClass.TIMESTAMP,
-        should_report=lambda robot: robot.sleep_mode_enabled,
+        should_report=lambda robot: robot.sleep_mode_enabled,  # type: ignore[no-any-return]
     ),
     LitterRobotSensorEntityDescription(
         name="Sleep Mode End Time",
         key="sleep_mode_end_time",
         device_class=SensorDeviceClass.TIMESTAMP,
-        should_report=lambda robot: robot.sleep_mode_enabled,
+        should_report=lambda robot: robot.sleep_mode_enabled,  # type: ignore[no-any-return]
     ),
     LitterRobotSensorEntityDescription(
         name="Last Seen",
diff --git a/homeassistant/components/litterrobot/switch.py b/homeassistant/components/litterrobot/switch.py
index 4d302a0d4ae..5374add1e34 100644
--- a/homeassistant/components/litterrobot/switch.py
+++ b/homeassistant/components/litterrobot/switch.py
@@ -17,11 +17,11 @@ class LitterRobotNightLightModeSwitch(LitterRobotConfigEntity, SwitchEntity):
     """Litter-Robot Night Light Mode Switch."""
 
     @property
-    def is_on(self) -> bool:
+    def is_on(self) -> bool | None:
         """Return true if switch is on."""
         if self._refresh_callback is not None:
             return self._assumed_state
-        return self.robot.night_light_mode_enabled
+        return self.robot.night_light_mode_enabled  # type: ignore[no-any-return]
 
     @property
     def icon(self) -> str:
@@ -41,11 +41,11 @@ class LitterRobotPanelLockoutSwitch(LitterRobotConfigEntity, SwitchEntity):
     """Litter-Robot Panel Lockout Switch."""
 
     @property
-    def is_on(self) -> bool:
+    def is_on(self) -> bool | None:
         """Return true if switch is on."""
         if self._refresh_callback is not None:
             return self._assumed_state
-        return self.robot.panel_lock_enabled
+        return self.robot.panel_lock_enabled  # type: ignore[no-any-return]
 
     @property
     def icon(self) -> str:
@@ -61,7 +61,9 @@ class LitterRobotPanelLockoutSwitch(LitterRobotConfigEntity, SwitchEntity):
         await self.perform_action_and_assume_state(self.robot.set_panel_lockout, False)
 
 
-ROBOT_SWITCHES: list[tuple[type[LitterRobotConfigEntity], str]] = [
+ROBOT_SWITCHES: list[
+    tuple[type[LitterRobotNightLightModeSwitch | LitterRobotPanelLockoutSwitch], str]
+] = [
     (LitterRobotNightLightModeSwitch, "Night Light Mode"),
     (LitterRobotPanelLockoutSwitch, "Panel Lockout"),
 ]
@@ -75,7 +77,7 @@ async def async_setup_entry(
     """Set up Litter-Robot switches using config entry."""
     hub: LitterRobotHub = hass.data[DOMAIN][entry.entry_id]
 
-    entities = []
+    entities: list[SwitchEntity] = []
     for robot in hub.account.robots:
         for switch_class, switch_type in ROBOT_SWITCHES:
             entities.append(switch_class(robot=robot, entity_type=switch_type, hub=hub))
diff --git a/mypy.ini b/mypy.ini
index ee953f13d74..af6abe6658f 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -1395,6 +1395,17 @@ no_implicit_optional = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.litterrobot.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+no_implicit_optional = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.local_ip.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true