diff --git a/homeassistant/components/upnp/__init__.py b/homeassistant/components/upnp/__init__.py
index 65049db8c4f..98bf3e6f4dd 100644
--- a/homeassistant/components/upnp/__init__.py
+++ b/homeassistant/components/upnp/__init__.py
@@ -20,6 +20,10 @@ from .const import (
     DISCOVERY_UDN,
     DISCOVERY_USN,
     DOMAIN,
+    DOMAIN_CONFIG,
+    DOMAIN_COORDINATORS,
+    DOMAIN_DEVICES,
+    DOMAIN_LOCAL_IP,
     LOGGER as _LOGGER,
 )
 from .device import Device
@@ -78,10 +82,10 @@ async def async_setup(hass: HomeAssistantType, config: ConfigType):
     conf = config.get(DOMAIN, conf_default)
     local_ip = await hass.async_add_executor_job(get_local_ip)
     hass.data[DOMAIN] = {
-        "config": conf,
-        "devices": {},
-        "coordinators": {},
-        "local_ip": conf.get(CONF_LOCAL_IP, local_ip),
+        DOMAIN_CONFIG: conf,
+        DOMAIN_COORDINATORS: {},
+        DOMAIN_DEVICES: {},
+        DOMAIN_LOCAL_IP: conf.get(CONF_LOCAL_IP, local_ip),
     }
 
     # Only start if set up via configuration.yaml.
@@ -108,7 +112,7 @@ async def async_setup_entry(hass: HomeAssistantType, config_entry: ConfigEntry)
         raise ConfigEntryNotReady
 
     # Save device
-    hass.data[DOMAIN]["devices"][device.udn] = device
+    hass.data[DOMAIN][DOMAIN_DEVICES][device.udn] = device
 
     # Ensure entry has proper unique_id.
     if config_entry.unique_id != device.unique_id:
@@ -141,8 +145,10 @@ async def async_unload_entry(
 ) -> bool:
     """Unload a UPnP/IGD device from a config entry."""
     udn = config_entry.data.get(CONFIG_ENTRY_UDN)
-    del hass.data[DOMAIN]["devices"][udn]
-    del hass.data[DOMAIN]["coordinators"][udn]
+    if udn in hass.data[DOMAIN][DOMAIN_DEVICES]:
+        del hass.data[DOMAIN][DOMAIN_DEVICES][udn]
+    if udn in hass.data[DOMAIN][DOMAIN_COORDINATORS]:
+        del hass.data[DOMAIN][DOMAIN_COORDINATORS][udn]
 
     _LOGGER.debug("Deleting sensors")
     return await hass.config_entries.async_forward_entry_unload(config_entry, "sensor")
diff --git a/homeassistant/components/upnp/config_flow.py b/homeassistant/components/upnp/config_flow.py
index 6d85ba94270..0c57a2c243e 100644
--- a/homeassistant/components/upnp/config_flow.py
+++ b/homeassistant/components/upnp/config_flow.py
@@ -20,6 +20,7 @@ from .const import (  # pylint: disable=unused-import
     DISCOVERY_UDN,
     DISCOVERY_USN,
     DOMAIN,
+    DOMAIN_COORDINATORS,
     LOGGER as _LOGGER,
 )
 from .device import Device
@@ -221,7 +222,7 @@ class UpnpOptionsFlowHandler(config_entries.OptionsFlow):
         """Manage the options."""
         if user_input is not None:
             udn = self.config_entry.data.get(CONFIG_ENTRY_UDN)
-            coordinator = self.hass.data[DOMAIN]["coordinators"][udn]
+            coordinator = self.hass.data[DOMAIN][DOMAIN_COORDINATORS][udn]
             update_interval_sec = user_input.get(
                 CONFIG_ENTRY_SCAN_INTERVAL, DEFAULT_SCAN_INTERVAL
             )
diff --git a/homeassistant/components/upnp/const.py b/homeassistant/components/upnp/const.py
index eb0844e2cb0..8256fdd9fc9 100644
--- a/homeassistant/components/upnp/const.py
+++ b/homeassistant/components/upnp/const.py
@@ -4,9 +4,14 @@ import logging
 
 from homeassistant.const import TIME_SECONDS
 
+LOGGER = logging.getLogger(__package__)
+
 CONF_LOCAL_IP = "local_ip"
 DOMAIN = "upnp"
-LOGGER = logging.getLogger(__package__)
+DOMAIN_COORDINATORS = "coordinators"
+DOMAIN_DEVICES = "devices"
+DOMAIN_LOCAL_IP = "local_ip"
+DOMAIN_CONFIG = "config"
 BYTES_RECEIVED = "bytes_received"
 BYTES_SENT = "bytes_sent"
 PACKETS_RECEIVED = "packets_received"
diff --git a/homeassistant/components/upnp/device.py b/homeassistant/components/upnp/device.py
index 05113b8f9f6..c4a81db1ff4 100644
--- a/homeassistant/components/upnp/device.py
+++ b/homeassistant/components/upnp/device.py
@@ -20,6 +20,7 @@ from .const import (
     DISCOVERY_UDN,
     DISCOVERY_USN,
     DOMAIN,
+    DOMAIN_CONFIG,
     LOGGER as _LOGGER,
     PACKETS_RECEIVED,
     PACKETS_SENT,
@@ -40,8 +41,8 @@ class Device:
         """Discover UPnP/IGD devices."""
         _LOGGER.debug("Discovering UPnP/IGD devices")
         local_ip = None
-        if DOMAIN in hass.data and "config" in hass.data[DOMAIN]:
-            local_ip = hass.data[DOMAIN]["config"].get(CONF_LOCAL_IP)
+        if DOMAIN in hass.data and DOMAIN_CONFIG in hass.data[DOMAIN]:
+            local_ip = hass.data[DOMAIN][DOMAIN_CONFIG].get(CONF_LOCAL_IP)
         if local_ip:
             local_ip = IPv4Address(local_ip)
 
diff --git a/homeassistant/components/upnp/sensor.py b/homeassistant/components/upnp/sensor.py
index f4d36da0b4d..5a34405e0c1 100644
--- a/homeassistant/components/upnp/sensor.py
+++ b/homeassistant/components/upnp/sensor.py
@@ -18,6 +18,8 @@ from .const import (
     DATA_RATE_PACKETS_PER_SECOND,
     DEFAULT_SCAN_INTERVAL,
     DOMAIN,
+    DOMAIN_COORDINATORS,
+    DOMAIN_DEVICES,
     KIBIBYTE,
     LOGGER as _LOGGER,
     PACKETS_RECEIVED,
@@ -84,9 +86,9 @@ async def async_setup_entry(
         udn = data[CONFIG_ENTRY_UDN]
     else:
         # any device will do
-        udn = list(hass.data[DOMAIN]["devices"].keys())[0]
+        udn = list(hass.data[DOMAIN][DOMAIN_DEVICES].keys())[0]
 
-    device: Device = hass.data[DOMAIN]["devices"][udn]
+    device: Device = hass.data[DOMAIN][DOMAIN_DEVICES][udn]
 
     update_interval_sec = config_entry.options.get(
         CONFIG_ENTRY_SCAN_INTERVAL, DEFAULT_SCAN_INTERVAL
@@ -102,7 +104,7 @@ async def async_setup_entry(
         update_interval=update_interval,
     )
     await coordinator.async_refresh()
-    hass.data[DOMAIN]["coordinators"][udn] = coordinator
+    hass.data[DOMAIN][DOMAIN_COORDINATORS][udn] = coordinator
 
     sensors = [
         RawUpnpSensor(coordinator, device, SENSOR_TYPES[BYTES_RECEIVED]),