diff --git a/homeassistant/components/unifi/const.py b/homeassistant/components/unifi/const.py
index c78313f66e2..2b16895a9a8 100644
--- a/homeassistant/components/unifi/const.py
+++ b/homeassistant/components/unifi/const.py
@@ -2,6 +2,8 @@
 
 import logging
 
+from aiounifi.models.device import DeviceState
+
 from homeassistant.const import Platform
 
 LOGGER = logging.getLogger(__package__)
@@ -46,3 +48,19 @@ ATTR_MANUFACTURER = "Ubiquiti Networks"
 BLOCK_SWITCH = "block"
 DPI_SWITCH = "dpi"
 OUTLET_SWITCH = "outlet"
+
+DEVICE_STATES = {
+    DeviceState.DISCONNECTED: "Disconnected",
+    DeviceState.CONNECTED: "Connected",
+    DeviceState.PENDING: "Pending",
+    DeviceState.FIRMWARE_MISMATCH: "Firmware Mismatch",
+    DeviceState.UPGRADING: "Upgrading",
+    DeviceState.PROVISIONING: "Provisioning",
+    DeviceState.HEARTBEAT_MISSED: "Heartbeat Missed",
+    DeviceState.ADOPTING: "Adopting",
+    DeviceState.DELETING: "Deleting",
+    DeviceState.INFORM_ERROR: "Inform Error",
+    DeviceState.ADOPTION_FALIED: "Adoption Failed",
+    DeviceState.ISOLATED: "Isolated",
+    DeviceState.UNKNOWN: "Unknown",
+}
diff --git a/homeassistant/components/unifi/manifest.json b/homeassistant/components/unifi/manifest.json
index 7d4717d3fff..4a43a65d5bb 100644
--- a/homeassistant/components/unifi/manifest.json
+++ b/homeassistant/components/unifi/manifest.json
@@ -8,7 +8,7 @@
   "iot_class": "local_push",
   "loggers": ["aiounifi"],
   "quality_scale": "platinum",
-  "requirements": ["aiounifi==67"],
+  "requirements": ["aiounifi==68"],
   "ssdp": [
     {
       "manufacturer": "Ubiquiti Networks",
diff --git a/homeassistant/components/unifi/sensor.py b/homeassistant/components/unifi/sensor.py
index 4d5cf49b5c9..cc825ea51af 100644
--- a/homeassistant/components/unifi/sensor.py
+++ b/homeassistant/components/unifi/sensor.py
@@ -36,6 +36,7 @@ from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 import homeassistant.util.dt as dt_util
 
+from .const import DEVICE_STATES
 from .controller import UniFiController
 from .entity import (
     HandlerT,
@@ -138,6 +139,12 @@ class UnifiSensorEntityDescriptionMixin(Generic[HandlerT, ApiItemT]):
     value_fn: Callable[[UniFiController, ApiItemT], datetime | float | str | None]
 
 
+@callback
+def async_device_state_value_fn(controller: UniFiController, device: Device) -> str:
+    """Retrieve the state of the device."""
+    return DEVICE_STATES[device.state]
+
+
 @dataclass
 class UnifiSensorEntityDescription(
     SensorEntityDescription,
@@ -343,6 +350,25 @@ ENTITY_DESCRIPTIONS: tuple[UnifiSensorEntityDescription, ...] = (
         unique_id_fn=lambda controller, obj_id: f"device_temperature-{obj_id}",
         value_fn=lambda ctrlr, device: device.general_temperature,
     ),
+    UnifiSensorEntityDescription[Devices, Device](
+        key="Device State",
+        device_class=SensorDeviceClass.ENUM,
+        entity_category=EntityCategory.DIAGNOSTIC,
+        has_entity_name=True,
+        allowed_fn=lambda controller, obj_id: True,
+        api_handler_fn=lambda api: api.devices,
+        available_fn=async_device_available_fn,
+        device_info_fn=async_device_device_info_fn,
+        event_is_on=None,
+        event_to_subscribe=None,
+        name_fn=lambda device: "State",
+        object_fn=lambda api, obj_id: api.devices[obj_id],
+        should_poll=False,
+        supported_fn=lambda controller, obj_id: True,
+        unique_id_fn=lambda controller, obj_id: f"device_state-{obj_id}",
+        value_fn=async_device_state_value_fn,
+        options=list(DEVICE_STATES.values()),
+    ),
 )
 
 
diff --git a/requirements_all.txt b/requirements_all.txt
index ac326d767b9..e7b00cf42bf 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -377,7 +377,7 @@ aiosyncthing==0.5.1
 aiotractive==0.5.6
 
 # homeassistant.components.unifi
-aiounifi==67
+aiounifi==68
 
 # homeassistant.components.vlc_telnet
 aiovlc==0.1.0
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 8fd36e8c6a6..119a926ed48 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -350,7 +350,7 @@ aiosyncthing==0.5.1
 aiotractive==0.5.6
 
 # homeassistant.components.unifi
-aiounifi==67
+aiounifi==68
 
 # homeassistant.components.vlc_telnet
 aiovlc==0.1.0
diff --git a/tests/components/unifi/test_sensor.py b/tests/components/unifi/test_sensor.py
index 854d136f3dd..6eb6c05209c 100644
--- a/tests/components/unifi/test_sensor.py
+++ b/tests/components/unifi/test_sensor.py
@@ -3,6 +3,7 @@ from copy import deepcopy
 from datetime import datetime, timedelta
 from unittest.mock import patch
 
+from aiounifi.models.device import DeviceState
 from aiounifi.models.message import MessageKey
 from freezegun.api import FrozenDateTimeFactory
 import pytest
@@ -20,6 +21,7 @@ from homeassistant.components.unifi.const import (
     CONF_ALLOW_UPTIME_SENSORS,
     CONF_TRACK_CLIENTS,
     CONF_TRACK_DEVICES,
+    DEVICE_STATES,
 )
 from homeassistant.config_entries import RELOAD_AFTER_UPDATE_DELAY
 from homeassistant.const import ATTR_DEVICE_CLASS, STATE_UNAVAILABLE, EntityCategory
@@ -584,7 +586,7 @@ async def test_poe_port_switches(
 ) -> None:
     """Test the update_items function with some clients."""
     await setup_unifi_integration(hass, aioclient_mock, devices_response=[DEVICE_1])
-    assert len(hass.states.async_entity_ids(SENSOR_DOMAIN)) == 1
+    assert len(hass.states.async_entity_ids(SENSOR_DOMAIN)) == 2
 
     ent_reg = er.async_get(hass)
     ent_reg_entry = ent_reg.async_get("sensor.mock_name_port_1_poe_power")
@@ -807,8 +809,8 @@ async def test_outlet_power_readings(
     """Test the outlet power reporting on PDU devices."""
     await setup_unifi_integration(hass, aioclient_mock, devices_response=[PDU_DEVICE_1])
 
-    assert len(hass.states.async_all()) == 10
-    assert len(hass.states.async_entity_ids(SENSOR_DOMAIN)) == 4
+    assert len(hass.states.async_all()) == 11
+    assert len(hass.states.async_entity_ids(SENSOR_DOMAIN)) == 5
 
     ent_reg = er.async_get(hass)
     ent_reg_entry = ent_reg.async_get(f"sensor.{entity_id}")
@@ -856,7 +858,7 @@ async def test_device_uptime(
     now = datetime(2021, 1, 1, 1, 1, 0, tzinfo=dt_util.UTC)
     with patch("homeassistant.util.dt.now", return_value=now):
         await setup_unifi_integration(hass, aioclient_mock, devices_response=[device])
-    assert len(hass.states.async_entity_ids(SENSOR_DOMAIN)) == 1
+    assert len(hass.states.async_entity_ids(SENSOR_DOMAIN)) == 2
     assert hass.states.get("sensor.device_uptime").state == "2021-01-01T01:00:00+00:00"
 
     ent_reg = er.async_get(hass)
@@ -912,7 +914,7 @@ async def test_device_temperature(
     }
 
     await setup_unifi_integration(hass, aioclient_mock, devices_response=[device])
-    assert len(hass.states.async_entity_ids(SENSOR_DOMAIN)) == 2
+    assert len(hass.states.async_entity_ids(SENSOR_DOMAIN)) == 3
     assert hass.states.get("sensor.device_temperature").state == "30"
 
     ent_reg = er.async_get(hass)
@@ -925,3 +927,43 @@ async def test_device_temperature(
     device["general_temperature"] = 60
     mock_unifi_websocket(message=MessageKey.DEVICE, data=device)
     assert hass.states.get("sensor.device_temperature").state == "60"
+
+
+async def test_device_state(
+    hass: HomeAssistant, aioclient_mock: AiohttpClientMocker, mock_unifi_websocket
+) -> None:
+    """Verify that state sensors are working as expected."""
+    device = {
+        "board_rev": 3,
+        "device_id": "mock-id",
+        "general_temperature": 30,
+        "has_fan": True,
+        "has_temperature": True,
+        "fan_level": 0,
+        "ip": "10.0.1.1",
+        "last_seen": 1562600145,
+        "mac": "00:00:00:00:01:01",
+        "model": "US16P150",
+        "name": "Device",
+        "next_interval": 20,
+        "overheating": True,
+        "state": 1,
+        "type": "usw",
+        "upgradable": True,
+        "uptime": 60,
+        "version": "4.0.42.10433",
+    }
+
+    await setup_unifi_integration(hass, aioclient_mock, devices_response=[device])
+    assert len(hass.states.async_entity_ids(SENSOR_DOMAIN)) == 3
+
+    ent_reg = er.async_get(hass)
+    assert (
+        ent_reg.async_get("sensor.device_state").entity_category
+        is EntityCategory.DIAGNOSTIC
+    )
+
+    for i in list(map(int, DeviceState)):
+        device["state"] = i
+        mock_unifi_websocket(message=MessageKey.DEVICE, data=device)
+        assert hass.states.get("sensor.device_state").state == DEVICE_STATES[i]
diff --git a/tests/components/unifi/test_update.py b/tests/components/unifi/test_update.py
index 4f7a3dfe11d..a9fe3fdae7c 100644
--- a/tests/components/unifi/test_update.py
+++ b/tests/components/unifi/test_update.py
@@ -117,7 +117,7 @@ async def test_device_updates(
 
     # Simulate update finished
 
-    device_1["state"] = "0"
+    device_1["state"] = 0
     device_1["version"] = "4.3.17.11279"
     device_1["upgradable"] = False
     del device_1["upgrade_to_firmware"]