diff --git a/homeassistant/components/totalconnect/alarm_control_panel.py b/homeassistant/components/totalconnect/alarm_control_panel.py
index c277198b683..ae999ade9ac 100644
--- a/homeassistant/components/totalconnect/alarm_control_panel.py
+++ b/homeassistant/components/totalconnect/alarm_control_panel.py
@@ -42,6 +42,7 @@ class TotalConnectAlarm(alarm.AlarmControlPanelEntity):
         """Initialize the TotalConnect status."""
         self._name = name
         self._location_id = location_id
+        self._unique_id = str(location_id)
         self._client = client
         self._state = None
         self._extra_state_attributes = {}
@@ -51,6 +52,11 @@ class TotalConnectAlarm(alarm.AlarmControlPanelEntity):
         """Return the name of the device."""
         return self._name
 
+    @property
+    def unique_id(self):
+        """Return the unique id."""
+        return self._unique_id
+
     @property
     def state(self):
         """Return the state of the device."""
diff --git a/tests/components/totalconnect/common.py b/tests/components/totalconnect/common.py
index d4285c07425..6f9fef4b7c0 100644
--- a/tests/components/totalconnect/common.py
+++ b/tests/components/totalconnect/common.py
@@ -9,8 +9,10 @@ from homeassistant.setup import async_setup_component
 
 from tests.common import MockConfigEntry
 
+LOCATION_ID = "123456"
+
 LOCATION_INFO_BASIC_NORMAL = {
-    "LocationID": "123456",
+    "LocationID": LOCATION_ID,
     "LocationName": "test",
     "SecurityDeviceID": "987654",
     "PhotoURL": "http://www.example.com/some/path/to/file.jpg",
diff --git a/tests/components/totalconnect/test_alarm_control_panel.py b/tests/components/totalconnect/test_alarm_control_panel.py
index 12ad53733b5..9d8dbaf0358 100644
--- a/tests/components/totalconnect/test_alarm_control_panel.py
+++ b/tests/components/totalconnect/test_alarm_control_panel.py
@@ -17,6 +17,7 @@ from homeassistant.const import (
 from homeassistant.exceptions import HomeAssistantError
 
 from .common import (
+    LOCATION_ID,
     RESPONSE_ARM_FAILURE,
     RESPONSE_ARM_SUCCESS,
     RESPONSE_ARMED_AWAY,
@@ -45,6 +46,11 @@ async def test_attributes(hass):
         mock_request.assert_called_once()
         assert state.attributes.get(ATTR_FRIENDLY_NAME) == "test"
 
+        entity_registry = await hass.helpers.entity_registry.async_get_registry()
+        entry = entity_registry.async_get(ENTITY_ID)
+        # TotalConnect alarm device unique_id is the location_id
+        assert entry.unique_id == LOCATION_ID
+
 
 async def test_arm_home_success(hass):
     """Test arm home method success."""