diff --git a/homeassistant/components/nexia/__init__.py b/homeassistant/components/nexia/__init__.py
index 873fccf57d02..b129e792361a 100644
--- a/homeassistant/components/nexia/__init__.py
+++ b/homeassistant/components/nexia/__init__.py
@@ -62,20 +62,33 @@ async def async_setup_entry(hass: HomeAssistant, entry: NexiaConfigEntry) -> boo
     await coordinator.async_config_entry_first_refresh()
     entry.runtime_data = coordinator
 
-    # Register thermostat devices before forwarding platforms so zone sub-devices
-    # can resolve their via_device_id regardless of platform setup order.
-    device_registry = dr.async_get(hass)
-    for thermostat_id in nexia_home.get_thermostat_ids():
-        device_registry.async_get_or_create(
-            config_entry_id=entry.entry_id,
-            identifiers={(DOMAIN, thermostat_id)},  # type: ignore[arg-type] # until fix issue #139773
-        )
+    _preregister_devices(hass, entry, nexia_home)
 
     await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)
 
     return True
 
 
+def _preregister_devices(
+    hass: HomeAssistant, entry: NexiaConfigEntry, nexia_home: NexiaHome
+) -> None:
+    """Register devices before forwarding platforms so sub-devices resolve via_device_id regardless of setup order."""
+    device_registry = dr.async_get(hass)
+    for thermostat_id in nexia_home.get_thermostat_ids():
+        thermostat = nexia_home.get_thermostat_by_id(thermostat_id)
+        device_registry.async_get_or_create(
+            config_entry_id=entry.entry_id,
+            identifiers={(DOMAIN, thermostat_id)},  # type: ignore[arg-type] # until fix issue #139773
+        )
+        for zone_id in thermostat.get_zone_ids():
+            zone = thermostat.get_zone_by_id(zone_id)
+            device_registry.async_get_or_create(
+                config_entry_id=entry.entry_id,
+                identifiers={(DOMAIN, zone_id)},  # type: ignore[arg-type] # until fix issue #139773
+                suggested_area=zone.get_name(),
+            )
+
+
 async def async_unload_entry(hass: HomeAssistant, entry: NexiaConfigEntry) -> bool:
     """Unload a config entry."""
     return await hass.config_entries.async_unload_platforms(entry, PLATFORMS)
diff --git a/homeassistant/components/nexia/entity.py b/homeassistant/components/nexia/entity.py
index 78762b6124a8..bffa33db0142 100644
--- a/homeassistant/components/nexia/entity.py
+++ b/homeassistant/components/nexia/entity.py
@@ -5,7 +5,7 @@ from typing import TYPE_CHECKING, override
 from nexia.thermostat import NexiaThermostat
 from nexia.zone import NexiaThermostatZone
 
-from homeassistant.const import ATTR_IDENTIFIERS, ATTR_NAME, ATTR_SUGGESTED_AREA
+from homeassistant.const import ATTR_IDENTIFIERS, ATTR_NAME
 from homeassistant.helpers import device_registry as dr
 from homeassistant.helpers.device_registry import DeviceInfo
 from homeassistant.helpers.dispatcher import (
@@ -103,13 +103,11 @@ class NexiaThermostatZoneEntity(NexiaThermostatEntity):
         """Initialize the entity."""
         super().__init__(coordinator, zone.thermostat, unique_id)
         self._zone = zone
-        zone_name = self._zone.get_name()
         if TYPE_CHECKING:
             assert self._attr_device_info is not None
         self._attr_device_info |= {
             ATTR_IDENTIFIERS: {(DOMAIN, zone.zone_id)},  # type: ignore[arg-type] # until fix issue #139773
-            ATTR_NAME: zone_name,
-            ATTR_SUGGESTED_AREA: zone_name,
+            ATTR_NAME: zone.get_name(),
             "via_device_id": dr.async_get_device_id_by_identifier(
                 self.coordinator.hass,
                 (DOMAIN, zone.thermostat.thermostat_id),  # type: ignore[arg-type] # until fix issue #139773
diff --git a/tests/components/nexia/test_init.py b/tests/components/nexia/test_init.py
index 1f869d78ebc1..cdb07c548257 100644
--- a/tests/components/nexia/test_init.py
+++ b/tests/components/nexia/test_init.py
@@ -5,12 +5,14 @@ from unittest.mock import NonCallableMock, patch
 import aiohttp
 from nexia.home import NexiaHome
 
+from homeassistant.components.nexia import _preregister_devices
 from homeassistant.components.nexia.const import DOMAIN
 from homeassistant.config_entries import ConfigEntryState
 from homeassistant.const import CONF_PASSWORD, CONF_USERNAME
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import device_registry as dr, entity_registry as er
 from homeassistant.setup import async_setup_component
+from homeassistant.util import slugify
 
 from .conftest import setup_integration
 
@@ -77,6 +79,39 @@ async def test_migrate_entry_minor_version_1_2(hass: HomeAssistant) -> None:
         assert entry.unique_id == "123456"
 
 
+async def test_device_preregistration(
+    hass: HomeAssistant, mock_nexia_home: NexiaHome, device_registry: dr.DeviceRegistry
+) -> None:
+    """Test all thermostat and zone devices are preregistered."""
+    entry = MockConfigEntry(domain=DOMAIN)
+    entry.add_to_hass(hass)
+
+    _preregister_devices(hass, entry, mock_nexia_home)
+
+    thermostat_ids = mock_nexia_home.get_thermostat_ids()
+    assert len(thermostat_ids) > 0
+
+    for thermostat_id in thermostat_ids:
+        thermostat = mock_nexia_home.get_thermostat_by_id(thermostat_id)
+        device = device_registry.async_get_device_by_identifier(
+            (DOMAIN, thermostat.thermostat_id),  # type: ignore[arg-type] # until fix issue #139773
+            entry.entry_id,
+        )
+        assert device is not None
+
+        zone_ids = thermostat.get_zone_ids()
+        assert len(zone_ids) > 0
+
+        for zone_id in zone_ids:
+            zone = thermostat.get_zone_by_id(zone_id)
+            device = device_registry.async_get_device_by_identifier(
+                (DOMAIN, zone.zone_id),  # type: ignore[arg-type] # until fix issue #139773
+                entry.entry_id,
+            )
+            assert device is not None
+            assert device.area_id == slugify(zone.get_name())
+
+
 async def test_device_via_device_links(
     hass: HomeAssistant,
     patch_nexia_home: NexiaHome,
@@ -86,14 +121,15 @@ async def test_device_via_device_links(
     config_entry = await setup_integration(hass, patch_nexia_home)
 
     thermostat_device = device_registry.async_get_device_by_identifier(
-        (DOMAIN, 2000000),  # type: ignore[arg-type] # until fix issue #139773
+        (DOMAIN, 2000004),  # type: ignore[arg-type] # until fix issue #139773
         config_entry.entry_id,
     )
     assert thermostat_device is not None
 
     zone_device = device_registry.async_get_device_by_identifier(
-        (DOMAIN, 100),  # type: ignore[arg-type] # until fix issue #139773
+        (DOMAIN, 500),  # type: ignore[arg-type] # until fix issue #139773
         config_entry.entry_id,
     )
     assert zone_device is not None
     assert zone_device.via_device_id == thermostat_device.id
+    assert zone_device.area_id == "center_nativezone"