diff --git a/homeassistant/components/hassio/__init__.py b/homeassistant/components/hassio/__init__.py
index 3eef1c14dd0..eeeedff00bb 100644
--- a/homeassistant/components/hassio/__init__.py
+++ b/homeassistant/components/hassio/__init__.py
@@ -385,18 +385,20 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:  # noqa:
     )
 
     last_timezone = None
+    last_country = None
 
     async def push_config(_: Event | None) -> None:
         """Push core config to Hass.io."""
         nonlocal last_timezone
+        nonlocal last_country
 
         new_timezone = str(hass.config.time_zone)
+        new_country = str(hass.config.country)
 
-        if new_timezone == last_timezone:
-            return
-
-        last_timezone = new_timezone
-        await hassio.update_hass_timezone(new_timezone)
+        if new_timezone != last_timezone or new_country != last_country:
+            last_timezone = new_timezone
+            last_country = new_country
+            await hassio.update_hass_config(new_timezone, new_country)
 
     hass.bus.async_listen(EVENT_CORE_CONFIG_UPDATE, push_config)
 
diff --git a/homeassistant/components/hassio/handler.py b/homeassistant/components/hassio/handler.py
index 752f535ca04..7aec0aa7a61 100644
--- a/homeassistant/components/hassio/handler.py
+++ b/homeassistant/components/hassio/handler.py
@@ -248,12 +248,14 @@ class HassIO:
         return await self.send_command("/homeassistant/options", payload=options)
 
     @_api_bool
-    def update_hass_timezone(self, timezone: str) -> Coroutine:
+    def update_hass_config(self, timezone: str, country: str | None) -> Coroutine:
         """Update Home-Assistant timezone data on Hass.io.
 
         This method returns a coroutine.
         """
-        return self.send_command("/supervisor/options", payload={"timezone": timezone})
+        return self.send_command(
+            "/supervisor/options", payload={"timezone": timezone, "country": country}
+        )
 
     @_api_bool
     def update_diagnostics(self, diagnostics: bool) -> Coroutine:
diff --git a/tests/components/hassio/test_init.py b/tests/components/hassio/test_init.py
index 2ac06b46fca..d34aed608fb 100644
--- a/tests/components/hassio/test_init.py
+++ b/tests/components/hassio/test_init.py
@@ -404,7 +404,7 @@ async def test_setup_api_existing_hassio_user(
     assert aioclient_mock.mock_calls[0][2]["refresh_token"] == token.token
 
 
-async def test_setup_core_push_timezone(
+async def test_setup_core_push_config(
     hass: HomeAssistant,
     aioclient_mock: AiohttpClientMocker,
     supervisor_client: AsyncMock,
@@ -421,9 +421,10 @@ async def test_setup_core_push_timezone(
     assert aioclient_mock.mock_calls[1][2]["timezone"] == "testzone"
 
     with patch("homeassistant.util.dt.set_default_time_zone"):
-        await hass.config.async_update(time_zone="America/New_York")
+        await hass.config.async_update(time_zone="America/New_York", country="US")
     await hass.async_block_till_done()
     assert aioclient_mock.mock_calls[-1][2]["timezone"] == "America/New_York"
+    assert aioclient_mock.mock_calls[-1][2]["country"] == "US"
 
 
 async def test_setup_hassio_no_additional_data(
diff --git a/tests/conftest.py b/tests/conftest.py
index efbd6f01cf7..ff4a09096e0 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1942,7 +1942,7 @@ async def hassio_stubs(
             return_value={"result": "ok"},
         ) as hass_api,
         patch(
-            "homeassistant.components.hassio.HassIO.update_hass_timezone",
+            "homeassistant.components.hassio.HassIO.update_hass_config",
             return_value={"result": "ok"},
         ),
         patch(