diff --git a/homeassistant/components/hassio/__init__.py b/homeassistant/components/hassio/__init__.py
index 0f17c0b5272..25482ddde95 100644
--- a/homeassistant/components/hassio/__init__.py
+++ b/homeassistant/components/hassio/__init__.py
@@ -69,6 +69,7 @@ from .const import (
     ATTR_VERSION,
     DATA_KEY_ADDONS,
     DATA_KEY_CORE,
+    DATA_KEY_HOST,
     DATA_KEY_OS,
     DATA_KEY_SUPERVISOR,
     DOMAIN,
@@ -668,6 +669,22 @@ def async_register_os_in_dev_reg(
     dev_reg.async_get_or_create(config_entry_id=entry_id, **params)
 
 
+@callback
+def async_register_host_in_dev_reg(
+    entry_id: str,
+    dev_reg: dr.DeviceRegistry,
+) -> None:
+    """Register host in the device registry."""
+    params = DeviceInfo(
+        identifiers={(DOMAIN, "host")},
+        manufacturer="Home Assistant",
+        model=SupervisorEntityModel.HOST,
+        name="Home Assistant Host",
+        entry_type=dr.DeviceEntryType.SERVICE,
+    )
+    dev_reg.async_get_or_create(config_entry_id=entry_id, **params)
+
+
 @callback
 def async_register_core_in_dev_reg(
     entry_id: str,
@@ -777,6 +794,7 @@ class HassioDataUpdateCoordinator(DataUpdateCoordinator):
             **supervisor_info,
             **get_supervisor_stats(self.hass),
         }
+        new_data[DATA_KEY_HOST] = get_host_info(self.hass) or {}
 
         # If this is the initial refresh, register all addons and return the dict
         if not self.data:
@@ -789,6 +807,7 @@ class HassioDataUpdateCoordinator(DataUpdateCoordinator):
             async_register_supervisor_in_dev_reg(
                 self.entry_id, self.dev_reg, new_data[DATA_KEY_SUPERVISOR]
             )
+            async_register_host_in_dev_reg(self.entry_id, self.dev_reg)
             if self.is_hass_os:
                 async_register_os_in_dev_reg(
                     self.entry_id, self.dev_reg, new_data[DATA_KEY_OS]
diff --git a/homeassistant/components/hassio/const.py b/homeassistant/components/hassio/const.py
index 2710e146540..cc9c58a3d27 100644
--- a/homeassistant/components/hassio/const.py
+++ b/homeassistant/components/hassio/const.py
@@ -68,6 +68,7 @@ DATA_KEY_ADDONS = "addons"
 DATA_KEY_OS = "os"
 DATA_KEY_SUPERVISOR = "supervisor"
 DATA_KEY_CORE = "core"
+DATA_KEY_HOST = "host"
 
 
 class SupervisorEntityModel(str, Enum):
@@ -77,3 +78,4 @@ class SupervisorEntityModel(str, Enum):
     OS = "Home Assistant Operating System"
     CORE = "Home Assistant Core"
     SUPERVIOSR = "Home Assistant Supervisor"
+    HOST = "Home Assistant Host"
diff --git a/homeassistant/components/hassio/entity.py b/homeassistant/components/hassio/entity.py
index dfa89ae911a..3a6a5a9f7c3 100644
--- a/homeassistant/components/hassio/entity.py
+++ b/homeassistant/components/hassio/entity.py
@@ -11,6 +11,7 @@ from .const import (
     ATTR_SLUG,
     DATA_KEY_ADDONS,
     DATA_KEY_CORE,
+    DATA_KEY_HOST,
     DATA_KEY_OS,
     DATA_KEY_SUPERVISOR,
 )
@@ -71,6 +72,32 @@ class HassioOSEntity(CoordinatorEntity[HassioDataUpdateCoordinator]):
         )
 
 
+class HassioHostEntity(CoordinatorEntity[HassioDataUpdateCoordinator]):
+    """Base Entity for Hass.io host."""
+
+    _attr_has_entity_name = True
+
+    def __init__(
+        self,
+        coordinator: HassioDataUpdateCoordinator,
+        entity_description: EntityDescription,
+    ) -> None:
+        """Initialize base entity."""
+        super().__init__(coordinator)
+        self.entity_description = entity_description
+        self._attr_unique_id = f"home_assistant_host_{entity_description.key}"
+        self._attr_device_info = DeviceInfo(identifiers={(DOMAIN, "host")})
+
+    @property
+    def available(self) -> bool:
+        """Return True if entity is available."""
+        return (
+            super().available
+            and DATA_KEY_HOST in self.coordinator.data
+            and self.entity_description.key in self.coordinator.data[DATA_KEY_HOST]
+        )
+
+
 class HassioSupervisorEntity(CoordinatorEntity[HassioDataUpdateCoordinator]):
     """Base Entity for Supervisor."""
 
diff --git a/homeassistant/components/hassio/sensor.py b/homeassistant/components/hassio/sensor.py
index a5b0b3a725f..b9a97adcbc2 100644
--- a/homeassistant/components/hassio/sensor.py
+++ b/homeassistant/components/hassio/sensor.py
@@ -2,12 +2,13 @@
 from __future__ import annotations
 
 from homeassistant.components.sensor import (
+    SensorDeviceClass,
     SensorEntity,
     SensorEntityDescription,
     SensorStateClass,
 )
 from homeassistant.config_entries import ConfigEntry
-from homeassistant.const import PERCENTAGE
+from homeassistant.const import PERCENTAGE, EntityCategory, UnitOfInformation
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
@@ -19,12 +20,14 @@ from .const import (
     ATTR_VERSION_LATEST,
     DATA_KEY_ADDONS,
     DATA_KEY_CORE,
+    DATA_KEY_HOST,
     DATA_KEY_OS,
     DATA_KEY_SUPERVISOR,
 )
 from .entity import (
     HassioAddonEntity,
     HassioCoreEntity,
+    HassioHostEntity,
     HassioOSEntity,
     HassioSupervisorEntity,
 )
@@ -66,6 +69,45 @@ CORE_ENTITY_DESCRIPTIONS = STATS_ENTITY_DESCRIPTIONS
 OS_ENTITY_DESCRIPTIONS = COMMON_ENTITY_DESCRIPTIONS
 SUPERVISOR_ENTITY_DESCRIPTIONS = STATS_ENTITY_DESCRIPTIONS
 
+HOST_ENTITY_DESCRIPTIONS = (
+    SensorEntityDescription(
+        entity_registry_enabled_default=False,
+        key="agent_version",
+        name="OS Agent version",
+        entity_category=EntityCategory.DIAGNOSTIC,
+    ),
+    SensorEntityDescription(
+        entity_registry_enabled_default=False,
+        key="apparmor_version",
+        name="Apparmor version",
+        entity_category=EntityCategory.DIAGNOSTIC,
+    ),
+    SensorEntityDescription(
+        entity_registry_enabled_default=False,
+        key="disk_total",
+        name="Disk total",
+        native_unit_of_measurement=UnitOfInformation.GIGABYTES,
+        device_class=SensorDeviceClass.DATA_SIZE,
+        entity_category=EntityCategory.DIAGNOSTIC,
+    ),
+    SensorEntityDescription(
+        entity_registry_enabled_default=False,
+        key="disk_used",
+        name="Disk used",
+        native_unit_of_measurement=UnitOfInformation.GIGABYTES,
+        device_class=SensorDeviceClass.DATA_SIZE,
+        entity_category=EntityCategory.DIAGNOSTIC,
+    ),
+    SensorEntityDescription(
+        entity_registry_enabled_default=False,
+        key="disk_free",
+        name="Disk free",
+        native_unit_of_measurement=UnitOfInformation.GIGABYTES,
+        device_class=SensorDeviceClass.DATA_SIZE,
+        entity_category=EntityCategory.DIAGNOSTIC,
+    ),
+)
+
 
 async def async_setup_entry(
     hass: HomeAssistant,
@@ -76,7 +118,7 @@ async def async_setup_entry(
     coordinator = hass.data[ADDONS_COORDINATOR]
 
     entities: list[
-        HassioOSSensor | HassioAddonSensor | CoreSensor | SupervisorSensor
+        HassioOSSensor | HassioAddonSensor | CoreSensor | SupervisorSensor | HostSensor
     ] = []
 
     for addon in coordinator.data[DATA_KEY_ADDONS].values():
@@ -105,6 +147,14 @@ async def async_setup_entry(
             )
         )
 
+    for entity_description in HOST_ENTITY_DESCRIPTIONS:
+        entities.append(
+            HostSensor(
+                coordinator=coordinator,
+                entity_description=entity_description,
+            )
+        )
+
     if coordinator.is_hass_os:
         for entity_description in OS_ENTITY_DESCRIPTIONS:
             entities.append(
@@ -153,3 +203,12 @@ class SupervisorSensor(HassioSupervisorEntity, SensorEntity):
     def native_value(self) -> str:
         """Return native value of entity."""
         return self.coordinator.data[DATA_KEY_SUPERVISOR][self.entity_description.key]
+
+
+class HostSensor(HassioHostEntity, SensorEntity):
+    """Sensor to track a host attribute."""
+
+    @property
+    def native_value(self) -> str:
+        """Return native value of entity."""
+        return self.coordinator.data[DATA_KEY_HOST][self.entity_description.key]
diff --git a/tests/components/hassio/test_diagnostics.py b/tests/components/hassio/test_diagnostics.py
index b3d47e93afd..6b0dae170c6 100644
--- a/tests/components/hassio/test_diagnostics.py
+++ b/tests/components/hassio/test_diagnostics.py
@@ -211,5 +211,6 @@ async def test_diagnostics(
     assert "core" in diagnostics["coordinator_data"]
     assert "supervisor" in diagnostics["coordinator_data"]
     assert "os" in diagnostics["coordinator_data"]
+    assert "host" in diagnostics["coordinator_data"]
 
-    assert len(diagnostics["devices"]) == 5
+    assert len(diagnostics["devices"]) == 6
diff --git a/tests/components/hassio/test_init.py b/tests/components/hassio/test_init.py
index a752fe1b677..ead65d81292 100644
--- a/tests/components/hassio/test_init.py
+++ b/tests/components/hassio/test_init.py
@@ -678,7 +678,7 @@ async def test_device_registry_calls(hass: HomeAssistant) -> None:
         config_entry.add_to_hass(hass)
         assert await hass.config_entries.async_setup(config_entry.entry_id)
         await hass.async_block_till_done()
-        assert len(dev_reg.devices) == 5
+        assert len(dev_reg.devices) == 6
 
     supervisor_mock_data = {
         "version": "1.0.0",
@@ -709,11 +709,11 @@ async def test_device_registry_calls(hass: HomeAssistant) -> None:
     ):
         async_fire_time_changed(hass, dt_util.now() + timedelta(hours=1))
         await hass.async_block_till_done()
-        assert len(dev_reg.devices) == 4
+        assert len(dev_reg.devices) == 5
 
         async_fire_time_changed(hass, dt_util.now() + timedelta(hours=2))
         await hass.async_block_till_done()
-        assert len(dev_reg.devices) == 4
+        assert len(dev_reg.devices) == 5
 
     supervisor_mock_data = {
         "version": "1.0.0",
@@ -763,7 +763,7 @@ async def test_device_registry_calls(hass: HomeAssistant) -> None:
     ):
         async_fire_time_changed(hass, dt_util.now() + timedelta(hours=3))
         await hass.async_block_till_done()
-        assert len(dev_reg.devices) == 4
+        assert len(dev_reg.devices) == 5
 
 
 async def test_coordinator_updates(
diff --git a/tests/components/hassio/test_sensor.py b/tests/components/hassio/test_sensor.py
index 99b1db2a99b..d33c6697321 100644
--- a/tests/components/hassio/test_sensor.py
+++ b/tests/components/hassio/test_sensor.py
@@ -44,12 +44,10 @@ def mock_all(aioclient_mock, request):
         json={
             "result": "ok",
             "data": {
-                "result": "ok",
-                "data": {
-                    "chassis": "vm",
-                    "operating_system": "Debian GNU/Linux 10 (buster)",
-                    "kernel": "4.19.0-6-amd64",
-                },
+                "agent_version": "1.0.0",
+                "chassis": "vm",
+                "operating_system": "Debian GNU/Linux 10 (buster)",
+                "kernel": "4.19.0-6-amd64",
             },
         },
     )
@@ -179,6 +177,9 @@ def mock_all(aioclient_mock, request):
     [
         ("sensor.home_assistant_operating_system_version", "1.0.0"),
         ("sensor.home_assistant_operating_system_newest_version", "1.0.0"),
+        ("sensor.home_assistant_host_os_agent_version", "1.0.0"),
+        ("sensor.home_assistant_core_cpu_percent", "0.99"),
+        ("sensor.home_assistant_supervisor_cpu_percent", "0.99"),
         ("sensor.test_version", "2.0.0"),
         ("sensor.test_newest_version", "2.0.1"),
         ("sensor.test2_version", "3.1.0"),