diff --git a/.strict-typing b/.strict-typing
index 439831790b0..6b2c52f42f6 100644
--- a/.strict-typing
+++ b/.strict-typing
@@ -261,6 +261,7 @@ homeassistant.components.persistent_notification.*
 homeassistant.components.pi_hole.*
 homeassistant.components.ping.*
 homeassistant.components.plugwise.*
+homeassistant.components.poolsense.*
 homeassistant.components.powerwall.*
 homeassistant.components.private_ble_device.*
 homeassistant.components.proximity.*
diff --git a/homeassistant/components/poolsense/binary_sensor.py b/homeassistant/components/poolsense/binary_sensor.py
index 56e417511bd..052a205a37b 100644
--- a/homeassistant/components/poolsense/binary_sensor.py
+++ b/homeassistant/components/poolsense/binary_sensor.py
@@ -48,6 +48,6 @@ class PoolSenseBinarySensor(PoolSenseEntity, BinarySensorEntity):
     """Representation of PoolSense binary sensors."""
 
     @property
-    def is_on(self):
+    def is_on(self) -> bool:
         """Return true if the binary sensor is on."""
         return self.coordinator.data[self.entity_description.key] == "red"
diff --git a/homeassistant/components/poolsense/config_flow.py b/homeassistant/components/poolsense/config_flow.py
index 6a6708b4045..64685d67035 100644
--- a/homeassistant/components/poolsense/config_flow.py
+++ b/homeassistant/components/poolsense/config_flow.py
@@ -1,11 +1,13 @@
 """Config flow for PoolSense integration."""
 import logging
+from typing import Any
 
 from poolsense import PoolSense
 import voluptuous as vol
 
 from homeassistant import config_entries
 from homeassistant.const import CONF_EMAIL, CONF_PASSWORD
+from homeassistant.data_entry_flow import FlowResult
 from homeassistant.helpers import aiohttp_client
 
 from .const import DOMAIN
@@ -21,7 +23,9 @@ class PoolSenseConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
     def __init__(self) -> None:
         """Initialize PoolSense config flow."""
 
-    async def async_step_user(self, user_input=None):
+    async def async_step_user(
+        self, user_input: dict[str, Any] | None = None
+    ) -> FlowResult:
         """Handle the initial step."""
         errors = {}
 
diff --git a/homeassistant/components/poolsense/coordinator.py b/homeassistant/components/poolsense/coordinator.py
index 3a5089b5022..e5e3e6ad1bd 100644
--- a/homeassistant/components/poolsense/coordinator.py
+++ b/homeassistant/components/poolsense/coordinator.py
@@ -6,8 +6,11 @@ import logging
 from poolsense import PoolSense
 from poolsense.exceptions import PoolSenseError
 
+from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import CONF_EMAIL, CONF_PASSWORD
+from homeassistant.core import HomeAssistant
 from homeassistant.helpers import aiohttp_client
+from homeassistant.helpers.typing import StateType
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
 
 from .const import DOMAIN
@@ -15,10 +18,10 @@ from .const import DOMAIN
 _LOGGER = logging.getLogger(__name__)
 
 
-class PoolSenseDataUpdateCoordinator(DataUpdateCoordinator):
+class PoolSenseDataUpdateCoordinator(DataUpdateCoordinator[dict[str, StateType]]):
     """Define an object to hold PoolSense data."""
 
-    def __init__(self, hass, entry):
+    def __init__(self, hass: HomeAssistant, entry: ConfigEntry) -> None:
         """Initialize."""
         self.poolsense = PoolSense(
             aiohttp_client.async_get_clientsession(hass),
@@ -26,11 +29,10 @@ class PoolSenseDataUpdateCoordinator(DataUpdateCoordinator):
             entry.data[CONF_PASSWORD],
         )
         self.hass = hass
-        self.entry = entry
 
         super().__init__(hass, _LOGGER, name=DOMAIN, update_interval=timedelta(hours=1))
 
-    async def _async_update_data(self):
+    async def _async_update_data(self) -> dict[str, StateType]:
         """Update data via library."""
         data = {}
         async with asyncio.timeout(10):
diff --git a/homeassistant/components/poolsense/entity.py b/homeassistant/components/poolsense/entity.py
index 2186d815135..0eca39cc48d 100644
--- a/homeassistant/components/poolsense/entity.py
+++ b/homeassistant/components/poolsense/entity.py
@@ -3,14 +3,20 @@ from homeassistant.helpers.entity import EntityDescription
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
 from .const import ATTRIBUTION
+from .coordinator import PoolSenseDataUpdateCoordinator
 
 
-class PoolSenseEntity(CoordinatorEntity):
+class PoolSenseEntity(CoordinatorEntity[PoolSenseDataUpdateCoordinator]):
     """Implements a common class elements representing the PoolSense component."""
 
     _attr_attribution = ATTRIBUTION
 
-    def __init__(self, coordinator, email, description: EntityDescription) -> None:
+    def __init__(
+        self,
+        coordinator: PoolSenseDataUpdateCoordinator,
+        email: str,
+        description: EntityDescription,
+    ) -> None:
         """Initialize poolsense sensor."""
         super().__init__(coordinator)
         self.entity_description = description
diff --git a/homeassistant/components/poolsense/sensor.py b/homeassistant/components/poolsense/sensor.py
index eee7518e6da..ed120562374 100644
--- a/homeassistant/components/poolsense/sensor.py
+++ b/homeassistant/components/poolsense/sensor.py
@@ -15,6 +15,7 @@ from homeassistant.const import (
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import StateType
 
 from .const import DOMAIN
 from .entity import PoolSenseEntity
@@ -93,6 +94,6 @@ class PoolSenseSensor(PoolSenseEntity, SensorEntity):
     """Sensor representing poolsense data."""
 
     @property
-    def native_value(self):
+    def native_value(self) -> StateType:
         """State of the sensor."""
         return self.coordinator.data[self.entity_description.key]
diff --git a/mypy.ini b/mypy.ini
index f18e781fd23..c2ecac66946 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -2372,6 +2372,16 @@ disallow_untyped_defs = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.poolsense.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.powerwall.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true