diff --git a/.coveragerc b/.coveragerc
index 5f820665db9..957ec8620cb 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -213,6 +213,7 @@ omit =
     homeassistant/components/doorbird/entity.py
     homeassistant/components/doorbird/util.py
     homeassistant/components/dormakaba_dkey/__init__.py
+    homeassistant/components/dormakaba_dkey/binary_sensor.py
     homeassistant/components/dormakaba_dkey/entity.py
     homeassistant/components/dormakaba_dkey/lock.py
     homeassistant/components/dormakaba_dkey/sensor.py
diff --git a/homeassistant/components/dormakaba_dkey/binary_sensor.py b/homeassistant/components/dormakaba_dkey/binary_sensor.py
new file mode 100644
index 00000000000..95e26a3eeb3
--- /dev/null
+++ b/homeassistant/components/dormakaba_dkey/binary_sensor.py
@@ -0,0 +1,88 @@
+"""Dormakaba dKey integration binary sensor platform."""
+from __future__ import annotations
+
+from collections.abc import Callable
+from dataclasses import dataclass
+
+from py_dormakaba_dkey import DKEYLock
+from py_dormakaba_dkey.commands import DoorPosition, Notifications, UnlockStatus
+
+from homeassistant.components.binary_sensor import (
+    BinarySensorDeviceClass,
+    BinarySensorEntity,
+    BinarySensorEntityDescription,
+)
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
+
+from .const import DOMAIN
+from .entity import DormakabaDkeyEntity
+from .models import DormakabaDkeyData
+
+
+@dataclass
+class DormakabaDkeyBinarySensorDescriptionMixin:
+    """Class for keys required by Dormakaba dKey binary sensor entity."""
+
+    is_on: Callable[[Notifications], bool]
+
+
+@dataclass
+class DormakabaDkeyBinarySensorDescription(
+    BinarySensorEntityDescription, DormakabaDkeyBinarySensorDescriptionMixin
+):
+    """Describes Dormakaba dKey binary sensor entity."""
+
+
+BINARY_SENSOR_DESCRIPTIONS = (
+    DormakabaDkeyBinarySensorDescription(
+        key="door_position",
+        name="Door",
+        device_class=BinarySensorDeviceClass.DOOR,
+        is_on=lambda state: state.door_position == DoorPosition.OPEN,
+    ),
+    DormakabaDkeyBinarySensorDescription(
+        key="security_locked",
+        name="Dead bolt",
+        device_class=BinarySensorDeviceClass.LOCK,
+        is_on=lambda state: state.unlock_status != UnlockStatus.SECURITY_LOCKED,
+    ),
+)
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
+    """Set up the binary sensor platform for Dormakaba dKey."""
+    data: DormakabaDkeyData = hass.data[DOMAIN][entry.entry_id]
+    async_add_entities(
+        DormakabaDkeyBinarySensor(data.coordinator, data.lock, description)
+        for description in BINARY_SENSOR_DESCRIPTIONS
+    )
+
+
+class DormakabaDkeyBinarySensor(DormakabaDkeyEntity, BinarySensorEntity):
+    """Dormakaba dKey binary sensor."""
+
+    _attr_has_entity_name = True
+    entity_description: DormakabaDkeyBinarySensorDescription
+
+    def __init__(
+        self,
+        coordinator: DataUpdateCoordinator[None],
+        lock: DKEYLock,
+        description: DormakabaDkeyBinarySensorDescription,
+    ) -> None:
+        """Initialize a Dormakaba dKey binary sensor."""
+        self.entity_description = description
+        self._attr_unique_id = f"{lock.address}_{description.key}"
+        super().__init__(coordinator, lock)
+
+    @callback
+    def _async_update_attrs(self) -> None:
+        """Handle updating _attr values."""
+        self._attr_is_on = self.entity_description.is_on(self._lock.state)