diff --git a/.strict-typing b/.strict-typing
index 041da10ab80..9f91b5ab699 100644
--- a/.strict-typing
+++ b/.strict-typing
@@ -439,6 +439,7 @@ homeassistant.components.waqi.*
 homeassistant.components.water_heater.*
 homeassistant.components.watttime.*
 homeassistant.components.weather.*
+homeassistant.components.webhook.*
 homeassistant.components.webostv.*
 homeassistant.components.websocket_api.*
 homeassistant.components.wemo.*
diff --git a/homeassistant/components/webhook/__init__.py b/homeassistant/components/webhook/__init__.py
index 16f3e5c7ef2..00b27fdb647 100644
--- a/homeassistant/components/webhook/__init__.py
+++ b/homeassistant/components/webhook/__init__.py
@@ -174,7 +174,7 @@ async def async_handle_webhook(
                 )
 
     try:
-        response = await webhook["handler"](hass, webhook_id, request)
+        response: Response | None = await webhook["handler"](hass, webhook_id, request)
         if response is None:
             response = Response(status=HTTPStatus.OK)
         return response
diff --git a/homeassistant/components/webhook/trigger.py b/homeassistant/components/webhook/trigger.py
index 78728793f5d..e0f3412a562 100644
--- a/homeassistant/components/webhook/trigger.py
+++ b/homeassistant/components/webhook/trigger.py
@@ -3,8 +3,9 @@ from __future__ import annotations
 
 from dataclasses import dataclass
 import logging
+from typing import Any
 
-from aiohttp import hdrs
+from aiohttp import hdrs, web
 import voluptuous as vol
 
 from homeassistant.const import CONF_PLATFORM, CONF_WEBHOOK_ID
@@ -57,9 +58,11 @@ class TriggerInstance:
     job: HassJob
 
 
-async def _handle_webhook(hass, webhook_id, request):
+async def _handle_webhook(
+    hass: HomeAssistant, webhook_id: str, request: web.Request
+) -> None:
     """Handle incoming webhook."""
-    base_result = {"platform": "webhook", "webhook_id": webhook_id}
+    base_result: dict[str, Any] = {"platform": "webhook", "webhook_id": webhook_id}
 
     if "json" in request.headers.get(hdrs.CONTENT_TYPE, ""):
         base_result["json"] = await request.json()
@@ -133,7 +136,7 @@ async def async_attach_trigger(
     triggers[webhook_id].append(trigger_instance)
 
     @callback
-    def unregister():
+    def unregister() -> None:
         """Unregister webhook."""
         if issue_id:
             async_delete_issue(hass, DOMAIN, issue_id)
diff --git a/mypy.ini b/mypy.ini
index 7693912a6c8..c72aba4e62f 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -4153,6 +4153,16 @@ disallow_untyped_defs = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.webhook.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.webostv.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true