diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index bb75027224ad4f..fb07d60da3bcab 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -41,8 +41,8 @@ env:
   UV_CACHE_VERSION: 1
   MYPY_CACHE_VERSION: 9
   HA_SHORT_VERSION: "2025.2"
-  DEFAULT_PYTHON: "3.12"
-  ALL_PYTHON_VERSIONS: "['3.12', '3.13']"
+  DEFAULT_PYTHON: "3.13"
+  ALL_PYTHON_VERSIONS: "['3.13']"
   # 10.3 is the oldest supported version
   # - 10.3.32 is the version currently shipped with Synology (as of 17 Feb 2022)
   # 10.6 is the current long-term-support
diff --git a/.github/workflows/translations.yml b/.github/workflows/translations.yml
index 3fffc41e60c6d6..fa3c23051909ec 100644
--- a/.github/workflows/translations.yml
+++ b/.github/workflows/translations.yml
@@ -10,7 +10,7 @@ on:
       - "**strings.json"
 
 env:
-  DEFAULT_PYTHON: "3.12"
+  DEFAULT_PYTHON: "3.13"
 
 jobs:
   upload:
diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index 1bab64e66e53b2..00f0c507414a92 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -17,7 +17,7 @@ on:
       - "script/gen_requirements_all.py"
 
 env:
-  DEFAULT_PYTHON: "3.12"
+  DEFAULT_PYTHON: "3.13"
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref_name}}
diff --git a/homeassistant/auth/mfa_modules/__init__.py b/homeassistant/auth/mfa_modules/__init__.py
index 8a6430d770a028..d0cb190ec6eaa9 100644
--- a/homeassistant/auth/mfa_modules/__init__.py
+++ b/homeassistant/auth/mfa_modules/__init__.py
@@ -4,9 +4,8 @@
 
 import logging
 import types
-from typing import Any, Generic
+from typing import Any, Generic, TypeVar
 
-from typing_extensions import TypeVar
 import voluptuous as vol
 from voluptuous.humanize import humanize_error
 
diff --git a/homeassistant/auth/providers/__init__.py b/homeassistant/auth/providers/__init__.py
index 02f99e7bd71767..36faf0e5e9cc50 100644
--- a/homeassistant/auth/providers/__init__.py
+++ b/homeassistant/auth/providers/__init__.py
@@ -5,9 +5,8 @@
 from collections.abc import Mapping
 import logging
 import types
-from typing import Any, Generic
+from typing import Any, Generic, TypeVar
 
-from typing_extensions import TypeVar
 import voluptuous as vol
 from voluptuous.humanize import humanize_error
 
diff --git a/homeassistant/components/actiontec/device_tracker.py b/homeassistant/components/actiontec/device_tracker.py
index b1b9c81c674e67..273ca6a772fe66 100644
--- a/homeassistant/components/actiontec/device_tracker.py
+++ b/homeassistant/components/actiontec/device_tracker.py
@@ -3,9 +3,9 @@
 from __future__ import annotations
 
 import logging
-import telnetlib  # pylint: disable=deprecated-module
 from typing import Final
 
+import telnetlib  # pylint: disable=deprecated-module
 import voluptuous as vol
 
 from homeassistant.components.device_tracker import (
diff --git a/homeassistant/components/assist_pipeline/websocket_api.py b/homeassistant/components/assist_pipeline/websocket_api.py
index c96af655589934..d61580f4a14bd3 100644
--- a/homeassistant/components/assist_pipeline/websocket_api.py
+++ b/homeassistant/components/assist_pipeline/websocket_api.py
@@ -1,9 +1,6 @@
 """Assist pipeline Websocket API."""
 
 import asyncio
-
-# Suppressing disable=deprecated-module is needed for Python 3.11
-import audioop  # pylint: disable=deprecated-module
 import base64
 from collections.abc import AsyncGenerator, Callable
 import contextlib
@@ -11,6 +8,8 @@
 import math
 from typing import Any, Final
 
+# Suppressing disable=deprecated-module is needed for Python 3.11
+import audioop  # pylint: disable=deprecated-module
 import voluptuous as vol
 
 from homeassistant.components import conversation, stt, tts, websocket_api
diff --git a/homeassistant/components/bluetooth/passive_update_coordinator.py b/homeassistant/components/bluetooth/passive_update_coordinator.py
index be232f87b24a3f..c20f55abcee807 100644
--- a/homeassistant/components/bluetooth/passive_update_coordinator.py
+++ b/homeassistant/components/bluetooth/passive_update_coordinator.py
@@ -2,9 +2,7 @@
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any
-
-from typing_extensions import TypeVar
+from typing import TYPE_CHECKING, Any, TypeVar
 
 from homeassistant.core import CALLBACK_TYPE, HomeAssistant, callback
 from homeassistant.helpers.update_coordinator import (
diff --git a/homeassistant/components/broadlink/device.py b/homeassistant/components/broadlink/device.py
index 75b6236a4731ef..ac90dd9af79f54 100644
--- a/homeassistant/components/broadlink/device.py
+++ b/homeassistant/components/broadlink/device.py
@@ -3,7 +3,7 @@
 from contextlib import suppress
 from functools import partial
 import logging
-from typing import Generic
+from typing import Generic, TypeVar
 
 import broadlink as blk
 from broadlink.exceptions import (
@@ -13,7 +13,6 @@
     ConnectionClosedError,
     NetworkTimeoutError,
 )
-from typing_extensions import TypeVar
 
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
diff --git a/homeassistant/components/broadlink/updater.py b/homeassistant/components/broadlink/updater.py
index f1455f5a5411b3..8e0a521e182cfb 100644
--- a/homeassistant/components/broadlink/updater.py
+++ b/homeassistant/components/broadlink/updater.py
@@ -5,11 +5,10 @@
 from abc import ABC, abstractmethod
 from datetime import datetime, timedelta
 import logging
-from typing import TYPE_CHECKING, Any, Generic
+from typing import TYPE_CHECKING, Any, Generic, TypeVar
 
 import broadlink as blk
 from broadlink.exceptions import AuthorizationError, BroadlinkException
-from typing_extensions import TypeVar
 
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
 from homeassistant.util import dt as dt_util
diff --git a/homeassistant/components/denon/media_player.py b/homeassistant/components/denon/media_player.py
index 0a6fe18d9869f0..2f46cd422943f4 100644
--- a/homeassistant/components/denon/media_player.py
+++ b/homeassistant/components/denon/media_player.py
@@ -3,8 +3,8 @@
 from __future__ import annotations
 
 import logging
-import telnetlib  # pylint: disable=deprecated-module
 
+import telnetlib  # pylint: disable=deprecated-module
 import voluptuous as vol
 
 from homeassistant.components.media_player import (
diff --git a/homeassistant/components/hddtemp/sensor.py b/homeassistant/components/hddtemp/sensor.py
index fbb6a6b48f9bf5..7ff00b8e282801 100644
--- a/homeassistant/components/hddtemp/sensor.py
+++ b/homeassistant/components/hddtemp/sensor.py
@@ -5,9 +5,9 @@
 from datetime import timedelta
 import logging
 import socket
-from telnetlib import Telnet  # pylint: disable=deprecated-module
 from typing import Any
 
+from telnetlib import Telnet  # pylint: disable=deprecated-module
 import voluptuous as vol
 
 from homeassistant.components.sensor import (
diff --git a/homeassistant/components/http/static.py b/homeassistant/components/http/static.py
index 9ca34af3741349..022eb9387e5955 100644
--- a/homeassistant/components/http/static.py
+++ b/homeassistant/components/http/static.py
@@ -4,8 +4,7 @@
 
 from collections.abc import Mapping
 from pathlib import Path
-import sys
-from typing import Final
+from typing import TYPE_CHECKING, Final
 
 from aiohttp.hdrs import CACHE_CONTROL, CONTENT_TYPE
 from aiohttp.web import FileResponse, Request, StreamResponse
@@ -18,14 +17,12 @@
 CACHE_HEADERS: Mapping[str, str] = {CACHE_CONTROL: CACHE_HEADER}
 RESPONSE_CACHE: LRU[tuple[str, Path], tuple[Path, str]] = LRU(512)
 
-if sys.version_info >= (3, 13):
-    # guess_type is soft-deprecated in 3.13
-    # for paths and should only be used for
-    # URLs. guess_file_type should be used
-    # for paths instead.
-    _GUESSER = CONTENT_TYPES.guess_file_type
-else:
+if TYPE_CHECKING:
+    # mypy uses Python 3.12 syntax for type checking
+    # once it uses Python 3.13, this can be removed
     _GUESSER = CONTENT_TYPES.guess_type
+else:
+    _GUESSER = CONTENT_TYPES.guess_file_type
 
 
 class CachingStaticResource(StaticResource):
diff --git a/homeassistant/components/pioneer/media_player.py b/homeassistant/components/pioneer/media_player.py
index 670ccffaea70c0..02072b6cb4301f 100644
--- a/homeassistant/components/pioneer/media_player.py
+++ b/homeassistant/components/pioneer/media_player.py
@@ -3,9 +3,9 @@
 from __future__ import annotations
 
 import logging
-import telnetlib  # pylint: disable=deprecated-module
 from typing import Final
 
+import telnetlib  # pylint: disable=deprecated-module
 import voluptuous as vol
 
 from homeassistant.components.media_player import (
diff --git a/homeassistant/components/ring/entity.py b/homeassistant/components/ring/entity.py
index b93a7f35322fb4..d48cc35a4f52de 100644
--- a/homeassistant/components/ring/entity.py
+++ b/homeassistant/components/ring/entity.py
@@ -2,7 +2,7 @@
 
 from collections.abc import Awaitable, Callable, Coroutine
 from dataclasses import dataclass
-from typing import Any, Concatenate, Generic, cast
+from typing import Any, Concatenate, Generic, TypeVar, cast
 
 from ring_doorbell import (
     AuthenticationError,
@@ -11,7 +11,6 @@
     RingGeneric,
     RingTimeout,
 )
-from typing_extensions import TypeVar
 
 from homeassistant.components.automation import automations_with_entity
 from homeassistant.components.script import scripts_with_entity
diff --git a/homeassistant/components/telnet/switch.py b/homeassistant/components/telnet/switch.py
index 82d8905a775664..0178a6521c4008 100644
--- a/homeassistant/components/telnet/switch.py
+++ b/homeassistant/components/telnet/switch.py
@@ -4,9 +4,9 @@
 
 from datetime import timedelta
 import logging
-import telnetlib  # pylint: disable=deprecated-module
 from typing import Any
 
+import telnetlib  # pylint: disable=deprecated-module
 import voluptuous as vol
 
 from homeassistant.components.switch import (
diff --git a/homeassistant/components/thomson/device_tracker.py b/homeassistant/components/thomson/device_tracker.py
index abf3e60447299a..4e44b2b1ffd9dd 100644
--- a/homeassistant/components/thomson/device_tracker.py
+++ b/homeassistant/components/thomson/device_tracker.py
@@ -4,8 +4,8 @@
 
 import logging
 import re
-import telnetlib  # pylint: disable=deprecated-module
 
+import telnetlib  # pylint: disable=deprecated-module
 import voluptuous as vol
 
 from homeassistant.components.device_tracker import (
diff --git a/homeassistant/components/weather/__init__.py b/homeassistant/components/weather/__init__.py
index 557765795ee88d..50d90c59d37e16 100644
--- a/homeassistant/components/weather/__init__.py
+++ b/homeassistant/components/weather/__init__.py
@@ -8,10 +8,19 @@
 from datetime import timedelta
 from functools import partial
 import logging
-from typing import Any, Final, Generic, Literal, Required, TypedDict, cast, final
+from typing import (
+    Any,
+    Final,
+    Generic,
+    Literal,
+    Required,
+    TypedDict,
+    TypeVar,
+    cast,
+    final,
+)
 
 from propcache import cached_property
-from typing_extensions import TypeVar
 import voluptuous as vol
 
 from homeassistant.config_entries import ConfigEntry
diff --git a/homeassistant/config_entries.py b/homeassistant/config_entries.py
index f73bed101eeb4e..00532152b532e4 100644
--- a/homeassistant/config_entries.py
+++ b/homeassistant/config_entries.py
@@ -22,11 +22,10 @@
 import logging
 from random import randint
 from types import MappingProxyType
-from typing import TYPE_CHECKING, Any, Generic, Self, cast
+from typing import TYPE_CHECKING, Any, Generic, Self, TypeVar, cast
 
 from async_interrupt import interrupt
 from propcache import cached_property
-from typing_extensions import TypeVar
 import voluptuous as vol
 
 from . import data_entry_flow, loader
diff --git a/homeassistant/const.py b/homeassistant/const.py
index efc01047caf932..699aebcafdf388 100644
--- a/homeassistant/const.py
+++ b/homeassistant/const.py
@@ -28,10 +28,10 @@
 PATCH_VERSION: Final = "0.dev0"
 __short_version__: Final = f"{MAJOR_VERSION}.{MINOR_VERSION}"
 __version__: Final = f"{__short_version__}.{PATCH_VERSION}"
-REQUIRED_PYTHON_VER: Final[tuple[int, int, int]] = (3, 12, 0)
+REQUIRED_PYTHON_VER: Final[tuple[int, int, int]] = (3, 13, 0)
 REQUIRED_NEXT_PYTHON_VER: Final[tuple[int, int, int]] = (3, 13, 0)
 # Truthy date string triggers showing related deprecation warning messages.
-REQUIRED_NEXT_PYTHON_HA_RELEASE: Final = "2025.2"
+REQUIRED_NEXT_PYTHON_HA_RELEASE: Final = ""
 
 # Format for platform files
 PLATFORM_FORMAT: Final = "{platform}.{domain}"
diff --git a/homeassistant/core.py b/homeassistant/core.py
index 5d0fcdc2b09ccf..58f96ed0ad256d 100644
--- a/homeassistant/core.py
+++ b/homeassistant/core.py
@@ -36,12 +36,12 @@
     NotRequired,
     Self,
     TypedDict,
+    TypeVar,
     cast,
     overload,
 )
 
 from propcache import cached_property, under_cached_property
-from typing_extensions import TypeVar
 import voluptuous as vol
 
 from . import util
diff --git a/homeassistant/data_entry_flow.py b/homeassistant/data_entry_flow.py
index 6df77443e7e1e4..e5ee5a7992287a 100644
--- a/homeassistant/data_entry_flow.py
+++ b/homeassistant/data_entry_flow.py
@@ -12,9 +12,8 @@
 from enum import StrEnum
 import logging
 from types import MappingProxyType
-from typing import Any, Generic, Required, TypedDict, cast
+from typing import Any, Generic, Required, TypedDict, TypeVar, cast
 
-from typing_extensions import TypeVar
 import voluptuous as vol
 
 from .core import HomeAssistant, callback
diff --git a/homeassistant/helpers/collection.py b/homeassistant/helpers/collection.py
index 86d3450c3a012f..1b01f1c3f5b496 100644
--- a/homeassistant/helpers/collection.py
+++ b/homeassistant/helpers/collection.py
@@ -11,9 +11,8 @@
 from itertools import groupby
 import logging
 from operator import attrgetter
-from typing import Any, Generic, TypedDict
+from typing import Any, Generic, TypedDict, TypeVar
 
-from typing_extensions import TypeVar
 import voluptuous as vol
 from voluptuous.humanize import humanize_error
 
diff --git a/homeassistant/helpers/data_entry_flow.py b/homeassistant/helpers/data_entry_flow.py
index adb2062a8ea58e..b15d8b9e6073b2 100644
--- a/homeassistant/helpers/data_entry_flow.py
+++ b/homeassistant/helpers/data_entry_flow.py
@@ -3,10 +3,9 @@
 from __future__ import annotations
 
 from http import HTTPStatus
-from typing import Any, Generic
+from typing import Any, Generic, TypeVar
 
 from aiohttp import web
-from typing_extensions import TypeVar
 import voluptuous as vol
 import voluptuous_serialize
 
diff --git a/homeassistant/helpers/entity_component.py b/homeassistant/helpers/entity_component.py
index 1be7289401ccfa..de20a257a9fe64 100644
--- a/homeassistant/helpers/entity_component.py
+++ b/homeassistant/helpers/entity_component.py
@@ -7,9 +7,7 @@
 from datetime import timedelta
 import logging
 from types import ModuleType
-from typing import Any, Generic
-
-from typing_extensions import TypeVar
+from typing import Any, Generic, TypeVar
 
 from homeassistant import config as conf_util
 from homeassistant.config_entries import ConfigEntry
diff --git a/homeassistant/helpers/update_coordinator.py b/homeassistant/helpers/update_coordinator.py
index 6cc4584935e5f4..039fbac5787348 100644
--- a/homeassistant/helpers/update_coordinator.py
+++ b/homeassistant/helpers/update_coordinator.py
@@ -9,13 +9,12 @@
 import logging
 from random import randint
 from time import monotonic
-from typing import Any, Generic, Protocol
+from typing import Any, Generic, Protocol, TypeVar
 import urllib.error
 
 import aiohttp
 from propcache import cached_property
 import requests
-from typing_extensions import TypeVar
 
 from homeassistant import config_entries
 from homeassistant.const import EVENT_HOMEASSISTANT_STOP
diff --git a/homeassistant/util/event_type.py b/homeassistant/util/event_type.py
index 509a35d33ae2a9..7755a45d3b9690 100644
--- a/homeassistant/util/event_type.py
+++ b/homeassistant/util/event_type.py
@@ -6,9 +6,7 @@
 from __future__ import annotations
 
 from collections.abc import Mapping
-from typing import Any, Generic
-
-from typing_extensions import TypeVar
+from typing import Any, Generic, TypeVar
 
 _DataT = TypeVar("_DataT", bound=Mapping[str, Any], default=Mapping[str, Any])
 
diff --git a/homeassistant/util/event_type.pyi b/homeassistant/util/event_type.pyi
index 4285e54e8c98b1..d3adb8a1c5446f 100644
--- a/homeassistant/util/event_type.pyi
+++ b/homeassistant/util/event_type.pyi
@@ -2,9 +2,7 @@
 # ruff: noqa: PYI021  # Allow docstrings
 
 from collections.abc import Mapping
-from typing import Any, Generic
-
-from typing_extensions import TypeVar
+from typing import Any, Generic, TypeVar
 
 __all__ = [
     "EventType",
diff --git a/pyproject.toml b/pyproject.toml
index b1bac5a2e1520b..1269e6668d1030 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,11 +18,10 @@ classifiers = [
     "Intended Audience :: Developers",
     "License :: OSI Approved :: Apache Software License",
     "Operating System :: OS Independent",
-    "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
     "Topic :: Home Automation",
 ]
-requires-python = ">=3.12.0"
+requires-python = ">=3.13.0"
 dependencies    = [
     "aiodns==3.2.0",
     # Integrations may depend on hassio integration without listing it to
@@ -104,7 +103,7 @@ include-package-data = true
 include = ["homeassistant*"]
 
 [tool.pylint.MAIN]
-py-version = "3.12"
+py-version = "3.13"
 # Use a conservative default here; 2 should speed up most setups and not hurt
 # any too bad. Override on command line as appropriate.
 jobs = 2
diff --git a/script/hassfest/mypy_config.py b/script/hassfest/mypy_config.py
index 1d7f2b5ed88824..cd37dbd543dc0d 100644
--- a/script/hassfest/mypy_config.py
+++ b/script/hassfest/mypy_config.py
@@ -9,8 +9,6 @@
 from pathlib import Path
 from typing import Final
 
-from homeassistant.const import REQUIRED_PYTHON_VER
-
 from .model import Config, Integration
 
 # Component modules which should set no_implicit_reexport = true.
@@ -31,7 +29,18 @@
 """.lstrip()
 
 GENERAL_SETTINGS: Final[dict[str, str]] = {
-    "python_version": ".".join(str(x) for x in REQUIRED_PYTHON_VER[:2]),
+    # We use @dataclass_transform in all our EntityDescriptions, causing
+    # `__replace__` to be already synthesized by mypy, causing **every** use of
+    # our entity descriptions to fail:
+    #
+    # error: Signature of "__replace__" incompatible with supertype "EntityDescription"
+    #
+    # Until this is fixed in mypy, we keep mypy locked on to Python 3.12 as we
+    # have done for the past few releases.
+    #
+    # Ref: https://github.com/python/mypy/issues/18216
+    # "python_version": ".".join(str(x) for x in REQUIRED_PYTHON_VER[:2]),
+    "python_version": "3.12",
     "platform": "linux",
     "plugins": ", ".join(  # noqa: FLY002
         [
diff --git a/tests/common.py b/tests/common.py
index d83955758de2d8..d9315ef074f90e 100644
--- a/tests/common.py
+++ b/tests/common.py
@@ -25,13 +25,12 @@
 import pathlib
 import time
 from types import FrameType, ModuleType
-from typing import Any, Literal, NoReturn
+from typing import Any, Literal, NoReturn, TypeVar
 from unittest.mock import AsyncMock, Mock, patch
 
 from aiohttp.test_utils import unused_port as get_test_instance_port  # noqa: F401
 import pytest
 from syrupy import SnapshotAssertion
-from typing_extensions import TypeVar
 import voluptuous as vol
 
 from homeassistant import auth, bootstrap, config_entries, loader
diff --git a/tests/components/homee/conftest.py b/tests/components/homee/conftest.py
index 881a24656f3ddc..a777f6b59a9447 100644
--- a/tests/components/homee/conftest.py
+++ b/tests/components/homee/conftest.py
@@ -1,9 +1,9 @@
 """Fixtures for Homee integration tests."""
 
+from collections.abc import Generator
 from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
-from typing_extensions import Generator
 
 from homeassistant.components.homee.const import DOMAIN
 from homeassistant.const import CONF_HOST, CONF_PASSWORD, CONF_USERNAME