diff --git a/homeassistant/components/knx/__init__.py b/homeassistant/components/knx/__init__.py
index 5caa284cc48..a8a923dc00a 100644
--- a/homeassistant/components/knx/__init__.py
+++ b/homeassistant/components/knx/__init__.py
@@ -15,7 +15,8 @@ from xknx.io import (
     ConnectionConfig,
     ConnectionType,
 )
-from xknx.telegram import AddressFilter, GroupAddress, Telegram
+from xknx.telegram import AddressFilter, Telegram
+from xknx.telegram.address import parse_device_group_address
 from xknx.telegram.apci import GroupValueRead, GroupValueResponse, GroupValueWrite
 
 from homeassistant.const import (
@@ -412,7 +413,7 @@ class KNXModule:
     async def service_event_register_modify(self, call: ServiceCall) -> None:
         """Service for adding or removing a GroupAddress to the knx_event filter."""
         attr_address = call.data[KNX_ADDRESS]
-        group_addresses = map(GroupAddress, attr_address)
+        group_addresses = map(parse_device_group_address, attr_address)
 
         if call.data.get(SERVICE_KNX_ATTR_REMOVE):
             for group_address in group_addresses:
@@ -483,7 +484,7 @@ class KNXModule:
 
         for address in attr_address:
             telegram = Telegram(
-                destination_address=GroupAddress(address),
+                destination_address=parse_device_group_address(address),
                 payload=GroupValueWrite(payload),
             )
             await self.xknx.telegrams.put(telegram)
@@ -492,7 +493,7 @@ class KNXModule:
         """Service for sending a GroupValueRead telegram to the KNX bus."""
         for address in call.data[KNX_ADDRESS]:
             telegram = Telegram(
-                destination_address=GroupAddress(address),
+                destination_address=parse_device_group_address(address),
                 payload=GroupValueRead(),
             )
             await self.xknx.telegrams.put(telegram)
diff --git a/homeassistant/components/knx/manifest.json b/homeassistant/components/knx/manifest.json
index 5f8711141e3..bcca5855bf1 100644
--- a/homeassistant/components/knx/manifest.json
+++ b/homeassistant/components/knx/manifest.json
@@ -2,7 +2,7 @@
   "domain": "knx",
   "name": "KNX",
   "documentation": "https://www.home-assistant.io/integrations/knx",
-  "requirements": ["xknx==0.18.0"],
+  "requirements": ["xknx==0.18.1"],
   "codeowners": ["@Julius2342", "@farmio", "@marvin-w"],
   "quality_scale": "silver",
   "iot_class": "local_push"
diff --git a/homeassistant/components/knx/schema.py b/homeassistant/components/knx/schema.py
index fb4b29fbd70..dc5a09534ec 100644
--- a/homeassistant/components/knx/schema.py
+++ b/homeassistant/components/knx/schema.py
@@ -1,8 +1,13 @@
 """Voluptuous schemas for the KNX integration."""
+from __future__ import annotations
+
+from typing import Any
+
 import voluptuous as vol
 from xknx.devices.climate import SetpointShiftMode
+from xknx.exceptions import CouldNotParseAddress
 from xknx.io import DEFAULT_MCAST_PORT
-from xknx.telegram.address import GroupAddress, IndividualAddress
+from xknx.telegram.address import IndividualAddress, parse_device_group_address
 
 from homeassistant.const import (
     CONF_DEVICE_CLASS,
@@ -29,11 +34,20 @@ from .const import (
 # KNX VALIDATORS
 ##################
 
-ga_validator = vol.Any(
-    cv.matches_regex(GroupAddress.ADDRESS_RE.pattern),
-    vol.All(vol.Coerce(int), vol.Range(min=1, max=65535)),
-    msg="value does not match pattern for KNX group address '<main>/<middle>/<sub>', '<main>/<sub>' or '<free>' (eg.'1/2/3', '9/234', '123')",
-)
+
+def ga_validator(value: Any) -> str | int:
+    """Validate that value is parsable as GroupAddress or InternalGroupAddress."""
+    if isinstance(value, (str, int)):
+        try:
+            parse_device_group_address(value)
+            return value
+        except CouldNotParseAddress:
+            pass
+    raise vol.Invalid(
+        f"value '{value}' is not a valid KNX group address '<main>/<middle>/<sub>', '<main>/<sub>' or '<free>' (eg.'1/2/3', '9/234', '123'), nor xknx internal address 'i-<string>'."
+    )
+
+
 ga_list_validator = vol.All(cv.ensure_list, [ga_validator])
 
 ia_validator = vol.Any(
diff --git a/requirements_all.txt b/requirements_all.txt
index bfb926195ac..81af5e09aa3 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -2353,7 +2353,7 @@ xbox-webapi==2.0.8
 xboxapi==2.0.1
 
 # homeassistant.components.knx
-xknx==0.18.0
+xknx==0.18.1
 
 # homeassistant.components.bluesound
 # homeassistant.components.rest
diff --git a/requirements_test_all.txt b/requirements_test_all.txt
index 50f0d3b70ca..e74d0517ccb 100644
--- a/requirements_test_all.txt
+++ b/requirements_test_all.txt
@@ -1244,7 +1244,7 @@ wolf_smartset==0.1.8
 xbox-webapi==2.0.8
 
 # homeassistant.components.knx
-xknx==0.18.0
+xknx==0.18.1
 
 # homeassistant.components.bluesound
 # homeassistant.components.rest