diff --git a/homeassistant/components/deconz/const.py b/homeassistant/components/deconz/const.py
index 31ae9eb018c..f60c4c35646 100644
--- a/homeassistant/components/deconz/const.py
+++ b/homeassistant/components/deconz/const.py
@@ -23,6 +23,7 @@ SUPPORTED_PLATFORMS = [
     "climate",
     "cover",
     "light",
+    "lock",
     "scene",
     "sensor",
     "switch",
@@ -38,10 +39,16 @@ ATTR_OFFSET = "offset"
 ATTR_ON = "on"
 ATTR_VALVE = "valve"
 
+# Covers
 DAMPERS = ["Level controllable output"]
 WINDOW_COVERS = ["Window covering device", "Window covering controller"]
 COVER_TYPES = DAMPERS + WINDOW_COVERS
 
+# Locks
+LOCKS = ["Door Lock"]
+LOCK_TYPES = LOCKS
+
+# Switches
 POWER_PLUGS = ["On/Off light", "On/Off plug-in unit", "Smart plug"]
 SIRENS = ["Warning device"]
 SWITCH_TYPES = POWER_PLUGS + SIRENS
diff --git a/homeassistant/components/deconz/light.py b/homeassistant/components/deconz/light.py
index 3f11cef31da..544699970f2 100644
--- a/homeassistant/components/deconz/light.py
+++ b/homeassistant/components/deconz/light.py
@@ -26,6 +26,7 @@ from .const import (
     CONF_GROUP_ID_BASE,
     COVER_TYPES,
     DOMAIN as DECONZ_DOMAIN,
+    LOCK_TYPES,
     NEW_GROUP,
     NEW_LIGHT,
     SWITCH_TYPES,
@@ -50,7 +51,7 @@ async def async_setup_entry(hass, config_entry, async_add_entities):
 
         for light in lights:
             if (
-                light.type not in COVER_TYPES + SWITCH_TYPES
+                light.type not in COVER_TYPES + LOCK_TYPES + SWITCH_TYPES
                 and light.uniqueid not in gateway.entities[DOMAIN]
             ):
                 entities.append(DeconzLight(light, gateway))
diff --git a/homeassistant/components/deconz/lock.py b/homeassistant/components/deconz/lock.py
new file mode 100644
index 00000000000..1f4fbe57069
--- /dev/null
+++ b/homeassistant/components/deconz/lock.py
@@ -0,0 +1,59 @@
+"""Support for deCONZ locks."""
+from homeassistant.components.lock import DOMAIN, LockEntity
+from homeassistant.core import callback
+from homeassistant.helpers.dispatcher import async_dispatcher_connect
+
+from .const import LOCKS, NEW_LIGHT
+from .deconz_device import DeconzDevice
+from .gateway import get_gateway_from_config_entry
+
+
+async def async_setup_entry(hass, config_entry, async_add_entities):
+    """Set up locks for deCONZ component.
+
+    Locks are based on the same device class as lights in deCONZ.
+    """
+    gateway = get_gateway_from_config_entry(hass, config_entry)
+    gateway.entities[DOMAIN] = set()
+
+    @callback
+    def async_add_lock(lights):
+        """Add lock from deCONZ."""
+        entities = []
+
+        for light in lights:
+
+            if light.type in LOCKS and light.uniqueid not in gateway.entities[DOMAIN]:
+                entities.append(DeconzLock(light, gateway))
+
+        if entities:
+            async_add_entities(entities, True)
+
+    gateway.listeners.append(
+        async_dispatcher_connect(
+            hass, gateway.async_signal_new_device(NEW_LIGHT), async_add_lock
+        )
+    )
+
+    async_add_lock(gateway.api.lights.values())
+
+
+class DeconzLock(DeconzDevice, LockEntity):
+    """Representation of a deCONZ lock."""
+
+    TYPE = DOMAIN
+
+    @property
+    def is_locked(self):
+        """Return true if lock is on."""
+        return self._device.state
+
+    async def async_lock(self, **kwargs):
+        """Lock the lock."""
+        data = {"on": True}
+        await self._device.async_set_state(data)
+
+    async def async_unlock(self, **kwargs):
+        """Unlock the lock."""
+        data = {"on": False}
+        await self._device.async_set_state(data)
diff --git a/tests/components/deconz/test_gateway.py b/tests/components/deconz/test_gateway.py
index 64818401bcb..e4dc0424f83 100644
--- a/tests/components/deconz/test_gateway.py
+++ b/tests/components/deconz/test_gateway.py
@@ -91,9 +91,10 @@ async def test_gateway_setup(hass):
         assert forward_entry_setup.mock_calls[1][1] == (entry, "climate")
         assert forward_entry_setup.mock_calls[2][1] == (entry, "cover")
         assert forward_entry_setup.mock_calls[3][1] == (entry, "light")
-        assert forward_entry_setup.mock_calls[4][1] == (entry, "scene")
-        assert forward_entry_setup.mock_calls[5][1] == (entry, "sensor")
-        assert forward_entry_setup.mock_calls[6][1] == (entry, "switch")
+        assert forward_entry_setup.mock_calls[4][1] == (entry, "lock")
+        assert forward_entry_setup.mock_calls[5][1] == (entry, "scene")
+        assert forward_entry_setup.mock_calls[6][1] == (entry, "sensor")
+        assert forward_entry_setup.mock_calls[7][1] == (entry, "switch")
 
 
 async def test_gateway_retry(hass):
diff --git a/tests/components/deconz/test_lock.py b/tests/components/deconz/test_lock.py
new file mode 100644
index 00000000000..554f825d42a
--- /dev/null
+++ b/tests/components/deconz/test_lock.py
@@ -0,0 +1,96 @@
+"""deCONZ lock platform tests."""
+from copy import deepcopy
+
+from homeassistant.components import deconz
+import homeassistant.components.lock as lock
+from homeassistant.const import STATE_LOCKED, STATE_UNLOCKED
+from homeassistant.setup import async_setup_component
+
+from .test_gateway import DECONZ_WEB_REQUEST, setup_deconz_integration
+
+from tests.async_mock import patch
+
+LOCKS = {
+    "1": {
+        "etag": "5c2ec06cde4bd654aef3a555fcd8ad12",
+        "hascolor": False,
+        "lastannounced": None,
+        "lastseen": "2020-08-22T15:29:03Z",
+        "manufacturername": "Danalock",
+        "modelid": "V3-BTZB",
+        "name": "Door lock",
+        "state": {"alert": "none", "on": False, "reachable": True},
+        "swversion": "19042019",
+        "type": "Door Lock",
+        "uniqueid": "00:00:00:00:00:00:00:00-00",
+    }
+}
+
+
+async def test_platform_manually_configured(hass):
+    """Test that we do not discover anything or try to set up a gateway."""
+    assert (
+        await async_setup_component(
+            hass, lock.DOMAIN, {"lock": {"platform": deconz.DOMAIN}}
+        )
+        is True
+    )
+    assert deconz.DOMAIN not in hass.data
+
+
+async def test_no_locks(hass):
+    """Test that no lock entities are created."""
+    gateway = await setup_deconz_integration(hass)
+    assert len(gateway.deconz_ids) == 0
+    assert len(hass.states.async_all()) == 0
+
+
+async def test_locks(hass):
+    """Test that all supported lock entities are created."""
+    data = deepcopy(DECONZ_WEB_REQUEST)
+    data["lights"] = deepcopy(LOCKS)
+    gateway = await setup_deconz_integration(hass, get_state_response=data)
+    assert "lock.door_lock" in gateway.deconz_ids
+    assert len(hass.states.async_all()) == 1
+
+    door_lock = hass.states.get("lock.door_lock")
+    assert door_lock.state == STATE_UNLOCKED
+
+    state_changed_event = {
+        "t": "event",
+        "e": "changed",
+        "r": "lights",
+        "id": "1",
+        "state": {"on": True},
+    }
+    gateway.api.event_handler(state_changed_event)
+    await hass.async_block_till_done()
+
+    door_lock = hass.states.get("lock.door_lock")
+    assert door_lock.state == STATE_LOCKED
+
+    door_lock_device = gateway.api.lights["1"]
+
+    with patch.object(door_lock_device, "_request", return_value=True) as set_callback:
+        await hass.services.async_call(
+            lock.DOMAIN,
+            lock.SERVICE_LOCK,
+            {"entity_id": "lock.door_lock"},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+        set_callback.assert_called_with("put", "/lights/1/state", json={"on": True})
+
+    with patch.object(door_lock_device, "_request", return_value=True) as set_callback:
+        await hass.services.async_call(
+            lock.DOMAIN,
+            lock.SERVICE_UNLOCK,
+            {"entity_id": "lock.door_lock"},
+            blocking=True,
+        )
+        await hass.async_block_till_done()
+        set_callback.assert_called_with("put", "/lights/1/state", json={"on": False})
+
+    await gateway.async_reset()
+
+    assert len(hass.states.async_all()) == 0