diff --git a/.coveragerc b/.coveragerc
index b0d6a40c7f7..4649f175606 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -605,6 +605,7 @@ omit =
     homeassistant/components/simplepush/notify.py
     homeassistant/components/simplisafe/__init__.py
     homeassistant/components/simplisafe/alarm_control_panel.py
+    homeassistant/components/simplisafe/lock.py
     homeassistant/components/simulated/sensor.py
     homeassistant/components/sisyphus/*
     homeassistant/components/sky_hub/device_tracker.py
diff --git a/homeassistant/components/simplisafe/__init__.py b/homeassistant/components/simplisafe/__init__.py
index 2514c5e9ed9..d57e7b83fa4 100644
--- a/homeassistant/components/simplisafe/__init__.py
+++ b/homeassistant/components/simplisafe/__init__.py
@@ -154,11 +154,10 @@ async def async_setup_entry(hass, config_entry):
     await simplisafe.async_update()
     hass.data[DOMAIN][DATA_CLIENT][config_entry.entry_id] = simplisafe
 
-    hass.async_create_task(
-        hass.config_entries.async_forward_entry_setup(
-            config_entry, "alarm_control_panel"
+    for component in ("alarm_control_panel", "lock"):
+        hass.async_create_task(
+            hass.config_entries.async_forward_entry_setup(config_entry, component)
         )
-    )
 
     async def refresh(event_time):
         """Refresh data from the SimpliSafe account."""
@@ -199,7 +198,12 @@ async def async_setup_entry(hass, config_entry):
 
 async def async_unload_entry(hass, entry):
     """Unload a SimpliSafe config entry."""
-    await hass.config_entries.async_forward_entry_unload(entry, "alarm_control_panel")
+    tasks = [
+        hass.config_entries.async_forward_entry_unload(entry, component)
+        for component in ("alarm_control_panel", "lock")
+    ]
+
+    await asyncio.gather(*tasks)
 
     hass.data[DOMAIN][DATA_CLIENT].pop(entry.entry_id)
     remove_listener = hass.data[DOMAIN][DATA_LISTENER].pop(entry.entry_id)
diff --git a/homeassistant/components/simplisafe/lock.py b/homeassistant/components/simplisafe/lock.py
new file mode 100644
index 00000000000..10c5d310e73
--- /dev/null
+++ b/homeassistant/components/simplisafe/lock.py
@@ -0,0 +1,72 @@
+"""Support for SimpliSafe locks."""
+import logging
+
+from simplipy.lock import LockStates
+
+from homeassistant.components.lock import LockDevice
+from homeassistant.const import STATE_LOCKED, STATE_UNKNOWN, STATE_UNLOCKED
+
+from . import SimpliSafeEntity
+from .const import DATA_CLIENT, DOMAIN
+
+_LOGGER = logging.getLogger(__name__)
+
+ATTR_LOCK_LOW_BATTERY = "lock_low_battery"
+ATTR_JAMMED = "jammed"
+ATTR_PIN_PAD_LOW_BATTERY = "pin_pad_low_battery"
+
+STATE_MAP = {
+    LockStates.locked: STATE_LOCKED,
+    LockStates.unknown: STATE_UNKNOWN,
+    LockStates.unlocked: STATE_UNLOCKED,
+}
+
+
+async def async_setup_entry(hass, entry, async_add_entities):
+    """Set up SimpliSafe locks based on a config entry."""
+    simplisafe = hass.data[DOMAIN][DATA_CLIENT][entry.entry_id]
+    async_add_entities(
+        [
+            SimpliSafeLock(system, lock)
+            for system in simplisafe.systems.values()
+            for lock in system.locks.values()
+        ]
+    )
+
+
+class SimpliSafeLock(SimpliSafeEntity, LockDevice):
+    """Define a SimpliSafe lock."""
+
+    def __init__(self, system, lock):
+        """Initialize."""
+        super().__init__(system, lock.name, serial=lock.serial)
+        self._lock = lock
+
+    @property
+    def is_locked(self):
+        """Return true if the lock is locked."""
+        return STATE_MAP.get(self._lock.state) == STATE_LOCKED
+
+    async def async_lock(self, **kwargs):
+        """Lock the lock."""
+        await self._lock.lock()
+
+    async def async_unlock(self, **kwargs):
+        """Unlock the lock."""
+        await self._lock.unlock()
+
+    async def async_update(self):
+        """Update lock status."""
+        if self._lock.offline or self._lock.disabled:
+            self._online = False
+            return
+
+        self._online = True
+
+        self._attrs.update(
+            {
+                ATTR_LOCK_LOW_BATTERY: self._lock.lock_low_battery,
+                ATTR_JAMMED: self._lock.state == LockStates.jammed,
+                ATTR_PIN_PAD_LOW_BATTERY: self._lock.pin_pad_low_battery,
+            }
+        )
diff --git a/homeassistant/components/simplisafe/manifest.json b/homeassistant/components/simplisafe/manifest.json
index 254e947ed25..61a16f8aa44 100644
--- a/homeassistant/components/simplisafe/manifest.json
+++ b/homeassistant/components/simplisafe/manifest.json
@@ -4,7 +4,7 @@
   "config_flow": true,
   "documentation": "https://www.home-assistant.io/integrations/simplisafe",
   "requirements": [
-    "simplisafe-python==5.1.0"
+    "simplisafe-python==5.2.0"
   ],
   "dependencies": [],
   "codeowners": [
diff --git a/requirements_all.txt b/requirements_all.txt
index d9f830fb5ee..c10b9b46621 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -1769,7 +1769,7 @@ shodan==1.19.0
 simplepush==1.1.4
 
 # homeassistant.components.simplisafe
-simplisafe-python==5.1.0
+simplisafe-python==5.2.0
 
 # homeassistant.components.sisyphus
 sisyphus-control==2.2.1
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 221995b0ac6..80c0a5cd33f 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -546,7 +546,7 @@ rxv==0.6.0
 samsungctl[websocket]==0.7.1
 
 # homeassistant.components.simplisafe
-simplisafe-python==5.1.0
+simplisafe-python==5.2.0
 
 # homeassistant.components.sleepiq
 sleepyq==0.7