diff --git a/homeassistant/components/govee_ble/manifest.json b/homeassistant/components/govee_ble/manifest.json
index 1bfd73e875f..ed1518be6cc 100644
--- a/homeassistant/components/govee_ble/manifest.json
+++ b/homeassistant/components/govee_ble/manifest.json
@@ -54,6 +54,10 @@
       "connectable": false,
       "local_name": "GVH5110*"
     },
+    {
+      "connectable": false,
+      "local_name": "GV5140*"
+    },
     {
       "connectable": false,
       "manufacturer_id": 1,
diff --git a/homeassistant/components/govee_ble/sensor.py b/homeassistant/components/govee_ble/sensor.py
index fa0b828176c..848268ae61f 100644
--- a/homeassistant/components/govee_ble/sensor.py
+++ b/homeassistant/components/govee_ble/sensor.py
@@ -21,6 +21,7 @@ from homeassistant.components.sensor import (
 )
 from homeassistant.const import (
     CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
+    CONCENTRATION_PARTS_PER_MILLION,
     PERCENTAGE,
     SIGNAL_STRENGTH_DECIBELS_MILLIWATT,
     UnitOfTemperature,
@@ -72,6 +73,12 @@ SENSOR_DESCRIPTIONS = {
         native_unit_of_measurement=CONCENTRATION_MICROGRAMS_PER_CUBIC_METER,
         state_class=SensorStateClass.MEASUREMENT,
     ),
+    (DeviceClass.CO2, Units.CONCENTRATION_PARTS_PER_MILLION): SensorEntityDescription(
+        key=f"{DeviceClass.CO2}_{Units.CONCENTRATION_PARTS_PER_MILLION}",
+        device_class=SensorDeviceClass.CO2,
+        native_unit_of_measurement=CONCENTRATION_PARTS_PER_MILLION,
+        state_class=SensorStateClass.MEASUREMENT,
+    ),
 }
 
 
diff --git a/homeassistant/generated/bluetooth.py b/homeassistant/generated/bluetooth.py
index 51709a3b548..3b558100903 100644
--- a/homeassistant/generated/bluetooth.py
+++ b/homeassistant/generated/bluetooth.py
@@ -212,6 +212,11 @@ BLUETOOTH: Final[list[dict[str, bool | str | int | list[int]]]] = [
         "domain": "govee_ble",
         "local_name": "GVH5110*",
     },
+    {
+        "connectable": False,
+        "domain": "govee_ble",
+        "local_name": "GV5140*",
+    },
     {
         "connectable": False,
         "domain": "govee_ble",
diff --git a/tests/components/govee_ble/__init__.py b/tests/components/govee_ble/__init__.py
index 66c5b0b832c..25721b08e05 100644
--- a/tests/components/govee_ble/__init__.py
+++ b/tests/components/govee_ble/__init__.py
@@ -84,7 +84,6 @@ GVH5106_SERVICE_INFO = BluetoothServiceInfo(
     source="local",
 )
 
-
 GV5125_BUTTON_0_SERVICE_INFO = BluetoothServiceInfo(
     name="GV51255367",
     address="C1:37:37:32:0F:45",
@@ -163,6 +162,16 @@ GV5123_CLOSED_SERVICE_INFO = BluetoothServiceInfo(
     source="24:4C:AB:03:E6:B8",
 )
 
+# Encodes: temperature=21.6°C, humidity=67.8%, CO2=531 ppm, no error
+GV5140_SERVICE_INFO = BluetoothServiceInfo(
+    name="GV5140EEFF",
+    address="AA:BB:CC:DD:EE:FF",
+    rssi=-63,
+    manufacturer_data={1: b"\x01\x01\x03\x4e\x66\x02\x13\x00"},
+    service_uuids=["0000ec88-0000-1000-8000-00805f9b34fb"],
+    service_data={},
+    source="local",
+)
 
 GVH5124_SERVICE_INFO = BluetoothServiceInfo(
     name="GV51242F68",
diff --git a/tests/components/govee_ble/test_sensor.py b/tests/components/govee_ble/test_sensor.py
index 2410b5dbbde..65dc1060b2a 100644
--- a/tests/components/govee_ble/test_sensor.py
+++ b/tests/components/govee_ble/test_sensor.py
@@ -17,6 +17,7 @@ from homeassistant.core import HomeAssistant
 from homeassistant.util import dt as dt_util
 
 from . import (
+    GV5140_SERVICE_INFO,
     GVH5075_SERVICE_INFO,
     GVH5106_SERVICE_INFO,
     GVH5178_PRIMARY_SERVICE_INFO,
@@ -163,6 +164,33 @@ async def test_gvh5178_multi_sensor(hass: HomeAssistant) -> None:
     assert primary_temp_sensor.state == STATE_UNAVAILABLE
 
 
+async def test_gv5140(hass: HomeAssistant) -> None:
+    """Test setting up creates the sensors for a device with CO2."""
+    entry = MockConfigEntry(
+        domain=DOMAIN,
+        unique_id="AA:BB:CC:DD:EE:FF",
+    )
+    entry.add_to_hass(hass)
+
+    assert await hass.config_entries.async_setup(entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert len(hass.states.async_all()) == 0
+    inject_bluetooth_service_info(hass, GV5140_SERVICE_INFO)
+    await hass.async_block_till_done()
+    assert len(hass.states.async_all()) == 3
+
+    co2_sensor = hass.states.get("sensor.5140eeff_carbon_dioxide")
+    co2_sensor_attributes = co2_sensor.attributes
+    assert co2_sensor.state == "531"
+    assert co2_sensor_attributes[ATTR_FRIENDLY_NAME] == "5140EEFF Carbon Dioxide"
+    assert co2_sensor_attributes[ATTR_UNIT_OF_MEASUREMENT] == "ppm"
+    assert co2_sensor_attributes[ATTR_STATE_CLASS] == "measurement"
+
+    assert await hass.config_entries.async_unload(entry.entry_id)
+    await hass.async_block_till_done()
+
+
 async def test_gvh5106(hass: HomeAssistant) -> None:
     """Test setting up creates the sensors for a device with PM25."""
     entry = MockConfigEntry(