diff --git a/CODEOWNERS b/CODEOWNERS
index d5d3e597f70..4c3ebac5bf1 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -421,6 +421,7 @@ build.json @home-assistant/supervisor
 /homeassistant/components/google_assistant/ @home-assistant/cloud
 /tests/components/google_assistant/ @home-assistant/cloud
 /homeassistant/components/google_cloud/ @lufton
+/homeassistant/components/google_sheets/ @tkdrob
 /homeassistant/components/google_travel_time/ @eifinger
 /tests/components/google_travel_time/ @eifinger
 /homeassistant/components/govee_ble/ @bdraco
diff --git a/homeassistant/components/google_sheets/__init__.py b/homeassistant/components/google_sheets/__init__.py
new file mode 100644
index 00000000000..a4c10da7f23
--- /dev/null
+++ b/homeassistant/components/google_sheets/__init__.py
@@ -0,0 +1,113 @@
+"""Support for Google Sheets."""
+from __future__ import annotations
+
+from datetime import datetime
+from typing import cast
+
+import aiohttp
+from google.auth.exceptions import RefreshError
+from google.oauth2.credentials import Credentials
+from gspread import Client
+import voluptuous as vol
+
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import CONF_ACCESS_TOKEN, CONF_TOKEN
+from homeassistant.core import HomeAssistant, ServiceCall
+from homeassistant.exceptions import ConfigEntryAuthFailed, ConfigEntryNotReady
+from homeassistant.helpers.config_entry_oauth2_flow import (
+    OAuth2Session,
+    async_get_config_entry_implementation,
+)
+import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.selector import ConfigEntrySelector
+
+from .const import DATA_CONFIG_ENTRY, DEFAULT_ACCESS, DOMAIN
+
+DATA = "data"
+WORKSHEET = "worksheet"
+
+SERVICE_APPEND_SHEET = "append_sheet"
+
+SHEET_SERVICE_SCHEMA = vol.All(
+    {
+        vol.Required(DATA_CONFIG_ENTRY): ConfigEntrySelector(),
+        vol.Optional(WORKSHEET): cv.string,
+        vol.Required(DATA): dict,
+    },
+)
+
+
+async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
+    """Set up Google Sheets from a config entry."""
+    implementation = await async_get_config_entry_implementation(hass, entry)
+    session = OAuth2Session(hass, entry, implementation)
+    try:
+        await session.async_ensure_token_valid()
+    except aiohttp.ClientResponseError as err:
+        if 400 <= err.status < 500:
+            raise ConfigEntryAuthFailed(
+                "OAuth session is not valid, reauth required"
+            ) from err
+        raise ConfigEntryNotReady from err
+    except aiohttp.ClientError as err:
+        raise ConfigEntryNotReady from err
+
+    if not async_entry_has_scopes(hass, entry):
+        raise ConfigEntryAuthFailed("Required scopes are not present, reauth required")
+    hass.data.setdefault(DOMAIN, {})[entry.entry_id] = session
+
+    await async_setup_service(hass)
+
+    return True
+
+
+def async_entry_has_scopes(hass: HomeAssistant, entry: ConfigEntry) -> bool:
+    """Verify that the config entry desired scope is present in the oauth token."""
+    return DEFAULT_ACCESS in entry.data.get(CONF_TOKEN, {}).get("scope", "").split(" ")
+
+
+async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
+    """Unload a config entry."""
+    hass.data[DOMAIN].pop(entry.entry_id)
+    return True
+
+
+async def async_setup_service(hass: HomeAssistant) -> None:
+    """Add the services for Google Sheets."""
+
+    def _append_to_sheet(call: ServiceCall, entry: ConfigEntry) -> None:
+        """Run append in the executor."""
+        service = Client(Credentials(entry.data[CONF_TOKEN][CONF_ACCESS_TOKEN]))
+        try:
+            sheet = service.open_by_key(entry.unique_id)
+        except RefreshError as ex:
+            entry.async_start_reauth(hass)
+            raise ex
+        worksheet = sheet.worksheet(call.data.get(WORKSHEET, sheet.sheet1.title))
+        row_data = {"created": str(datetime.now())} | call.data[DATA]
+        columns: list[str] = next(iter(worksheet.get_values("A1:ZZ1")), [])
+        row = [row_data.get(column, "") for column in columns]
+        for key, value in row_data.items():
+            if key not in columns:
+                columns.append(key)
+                worksheet.update_cell(1, len(columns), key)
+                row.append(value)
+        worksheet.append_row(row)
+
+    async def append_to_sheet(call: ServiceCall) -> None:
+        """Append new line of data to a Google Sheets document."""
+
+        entry = cast(
+            ConfigEntry,
+            hass.config_entries.async_get_entry(call.data[DATA_CONFIG_ENTRY]),
+        )
+        session: OAuth2Session = hass.data[DOMAIN][entry.entry_id]
+        await session.async_ensure_token_valid()
+        await hass.async_add_executor_job(_append_to_sheet, call, entry)
+
+    hass.services.async_register(
+        DOMAIN,
+        SERVICE_APPEND_SHEET,
+        append_to_sheet,
+        schema=SHEET_SERVICE_SCHEMA,
+    )
diff --git a/homeassistant/components/google_sheets/application_credentials.py b/homeassistant/components/google_sheets/application_credentials.py
new file mode 100644
index 00000000000..c54356b659e
--- /dev/null
+++ b/homeassistant/components/google_sheets/application_credentials.py
@@ -0,0 +1,27 @@
+"""application_credentials platform for Google Sheets."""
+
+import oauth2client
+
+from homeassistant.components.application_credentials import AuthorizationServer
+from homeassistant.core import HomeAssistant
+
+AUTHORIZATION_SERVER = AuthorizationServer(
+    oauth2client.GOOGLE_AUTH_URI, oauth2client.GOOGLE_TOKEN_URI
+)
+
+
+async def async_get_authorization_server(hass: HomeAssistant) -> AuthorizationServer:
+    """Return authorization server."""
+    return AuthorizationServer(
+        oauth2client.GOOGLE_AUTH_URI,
+        oauth2client.GOOGLE_TOKEN_URI,
+    )
+
+
+async def async_get_description_placeholders(hass: HomeAssistant) -> dict[str, str]:
+    """Return description placeholders for the credentials dialog."""
+    return {
+        "oauth_consent_url": "https://console.cloud.google.com/apis/credentials/consent",
+        "more_info_url": "https://www.home-assistant.io/integrations/google_sheets/",
+        "oauth_creds_url": "https://console.cloud.google.com/apis/credentials",
+    }
diff --git a/homeassistant/components/google_sheets/config_flow.py b/homeassistant/components/google_sheets/config_flow.py
new file mode 100644
index 00000000000..d19a5b5c3fa
--- /dev/null
+++ b/homeassistant/components/google_sheets/config_flow.py
@@ -0,0 +1,102 @@
+"""Config flow for Google Sheets integration."""
+from __future__ import annotations
+
+from collections.abc import Mapping
+import logging
+from typing import Any
+
+from google.oauth2.credentials import Credentials
+from gspread import Client, GSpreadException
+
+from homeassistant.config_entries import SOURCE_REAUTH, ConfigEntry
+from homeassistant.const import CONF_ACCESS_TOKEN, CONF_TOKEN
+from homeassistant.data_entry_flow import FlowResult
+from homeassistant.helpers import config_entry_oauth2_flow
+
+from .const import DEFAULT_ACCESS, DEFAULT_NAME, DOMAIN
+
+_LOGGER = logging.getLogger(__name__)
+
+
+class OAuth2FlowHandler(
+    config_entry_oauth2_flow.AbstractOAuth2FlowHandler, domain=DOMAIN
+):
+    """Config flow to handle Google Sheets OAuth2 authentication."""
+
+    DOMAIN = DOMAIN
+
+    @property
+    def logger(self) -> logging.Logger:
+        """Return logger."""
+        return logging.getLogger(__name__)
+
+    @property
+    def extra_authorize_data(self) -> dict[str, Any]:
+        """Extra data that needs to be appended to the authorize url."""
+        return {
+            "scope": DEFAULT_ACCESS,
+            # Add params to ensure we get back a refresh token
+            "access_type": "offline",
+            "prompt": "consent",
+        }
+
+    async def async_step_reauth(self, entry_data: Mapping[str, Any]) -> FlowResult:
+        """Perform reauth upon an API authentication error."""
+        return await self.async_step_reauth_confirm()
+
+    async def async_step_reauth_confirm(
+        self, user_input: dict[str, Any] | None = None
+    ) -> FlowResult:
+        """Confirm reauth dialog."""
+        if user_input is None:
+            return self.async_show_form(step_id="reauth_confirm")
+        return await self.async_step_user()
+
+    def _async_reauth_entry(self) -> ConfigEntry | None:
+        """Return existing entry for reauth."""
+        if self.source != SOURCE_REAUTH or not (
+            entry_id := self.context.get("entry_id")
+        ):
+            return None
+        return next(
+            (
+                entry
+                for entry in self._async_current_entries()
+                if entry.entry_id == entry_id
+            ),
+            None,
+        )
+
+    async def async_oauth_create_entry(self, data: dict[str, Any]) -> FlowResult:
+        """Create an entry for the flow, or update existing entry."""
+        service = Client(Credentials(data[CONF_TOKEN][CONF_ACCESS_TOKEN]))
+
+        if entry := self._async_reauth_entry():
+            _LOGGER.debug("service.open_by_key")
+            try:
+                await self.hass.async_add_executor_job(
+                    service.open_by_key,
+                    entry.unique_id,
+                )
+            except GSpreadException as err:
+                _LOGGER.error(
+                    "Could not find spreadsheet '%s': %s", entry.unique_id, str(err)
+                )
+                return self.async_abort(reason="open_spreadsheet_failure")
+
+            self.hass.config_entries.async_update_entry(entry, data=data)
+            await self.hass.config_entries.async_reload(entry.entry_id)
+            return self.async_abort(reason="reauth_successful")
+
+        try:
+            doc = await self.hass.async_add_executor_job(
+                service.create, "Home Assistant"
+            )
+        except GSpreadException as err:
+            _LOGGER.error("Error creating spreadsheet: %s", str(err))
+            return self.async_abort(reason="create_spreadsheet_failure")
+
+        await self.async_set_unique_id(doc.id)
+        return self.async_create_entry(
+            title=DEFAULT_NAME, data=data, description_placeholders={"url": doc.url}
+        )
diff --git a/homeassistant/components/google_sheets/const.py b/homeassistant/components/google_sheets/const.py
new file mode 100644
index 00000000000..f8f065972f9
--- /dev/null
+++ b/homeassistant/components/google_sheets/const.py
@@ -0,0 +1,10 @@
+"""Constants for Google Sheets integration."""
+from __future__ import annotations
+
+from typing import Final
+
+DOMAIN = "google_sheets"
+
+DATA_CONFIG_ENTRY: Final = "config_entry"
+DEFAULT_NAME = "Google Sheets"
+DEFAULT_ACCESS = "https://www.googleapis.com/auth/drive.file"
diff --git a/homeassistant/components/google_sheets/manifest.json b/homeassistant/components/google_sheets/manifest.json
new file mode 100644
index 00000000000..c8d86210b42
--- /dev/null
+++ b/homeassistant/components/google_sheets/manifest.json
@@ -0,0 +1,10 @@
+{
+  "domain": "google_sheets",
+  "name": "Google Sheets",
+  "config_flow": true,
+  "dependencies": ["application_credentials"],
+  "documentation": "https://www.home-assistant.io/integrations/google_sheets/",
+  "requirements": ["gspread==5.5.0"],
+  "codeowners": ["@tkdrob"],
+  "iot_class": "cloud_polling"
+}
diff --git a/homeassistant/components/google_sheets/services.yaml b/homeassistant/components/google_sheets/services.yaml
new file mode 100644
index 00000000000..7524ba50fb5
--- /dev/null
+++ b/homeassistant/components/google_sheets/services.yaml
@@ -0,0 +1,24 @@
+append_sheet:
+  name: Append to Sheet
+  description: Append data to a worksheet in Google Sheets.
+  fields:
+    config_entry:
+      name: Sheet
+      description: The sheet to add data to
+      required: true
+      selector:
+        config_entry:
+          integration: google_sheets
+    worksheet:
+      name: Worksheet
+      description: Name of the worksheet. Defaults to the first one in the document.
+      example: "Sheet1"
+      selector:
+        text:
+    data:
+      name: Data
+      description: Data to be appended to the worksheet. This puts the values on a new row underneath the matching column (key). Any new key is placed on the top of a new column.
+      required: true
+      example: '{"hello": world, "cool": True, "count": 5}'
+      selector:
+        object:
diff --git a/homeassistant/components/google_sheets/strings.json b/homeassistant/components/google_sheets/strings.json
new file mode 100644
index 00000000000..858f6856954
--- /dev/null
+++ b/homeassistant/components/google_sheets/strings.json
@@ -0,0 +1,31 @@
+{
+  "config": {
+    "step": {
+      "pick_implementation": {
+        "title": "[%key:common::config_flow::title::oauth2_pick_implementation%]"
+      },
+      "auth": {
+        "title": "Link Google Account"
+      }
+    },
+    "abort": {
+      "already_configured": "[%key:common::config_flow::abort::already_configured_account%]",
+      "already_in_progress": "[%key:common::config_flow::abort::already_in_progress%]",
+      "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
+      "timeout_connect": "[%key:common::config_flow::error::timeout_connect%]",
+      "oauth_error": "[%key:common::config_flow::abort::oauth2_error%]",
+      "missing_configuration": "[%key:common::config_flow::abort::oauth2_missing_configuration%]",
+      "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]",
+      "invalid_access_token": "[%key:common::config_flow::error::invalid_access_token%]",
+      "unknown": "[%key:common::config_flow::error::unknown%]",
+      "create_spreadsheet_failure": "Error while creating spreadsheet, see error log for details",
+      "open_spreadsheet_failure": "Error while opening spreadsheet, see error log for details"
+    },
+    "create_entry": {
+      "default": "Successfully authenticated and spreadsheet created at: {url}"
+    }
+  },
+  "application_credentials": {
+    "description": "Follow the [instructions]({more_info_url}) for [OAuth consent screen]({oauth_consent_url}) to give Home Assistant access to your Google Sheets. You also need to create Application Credentials linked to your account:\n1. Go to [Credentials]({oauth_creds_url}) and click **Create Credentials**.\n1. From the drop-down list select **OAuth client ID**.\n1. Select **Web application** for the Application Type.\n\n"
+  }
+}
diff --git a/homeassistant/components/google_sheets/translations/en.json b/homeassistant/components/google_sheets/translations/en.json
new file mode 100644
index 00000000000..c7348a0fa40
--- /dev/null
+++ b/homeassistant/components/google_sheets/translations/en.json
@@ -0,0 +1,31 @@
+{
+    "application_credentials": {
+        "description": "Follow the [instructions]({more_info_url}) for [OAuth consent screen]({oauth_consent_url}) to give Home Assistant access to your Google Sheets. You also need to create Application Credentials linked to your account:\n1. Go to [Credentials]({oauth_creds_url}) and click **Create Credentials**.\n1. From the drop-down list select **OAuth client ID**.\n1. Select **Web application** for the Application Type.\n\n"
+    },
+    "config": {
+        "abort": {
+            "already_configured": "Account is already configured",
+            "already_in_progress": "Configuration flow is already in progress",
+            "cannot_connect": "Failed to connect",
+            "create_spreadsheet_failure": "Error while creating spreadsheet, see error log for details",
+            "invalid_access_token": "Invalid access token",
+            "missing_configuration": "The component is not configured. Please follow the documentation.",
+            "oauth_error": "Received invalid token data.",
+            "open_spreadsheet_failure": "Error while opening spreadsheet, see error log for details",
+            "reauth_successful": "Re-authentication was successful",
+            "timeout_connect": "Timeout establishing connection",
+            "unknown": "Unexpected error"
+        },
+        "create_entry": {
+            "default": "Successfully authenticated and spreadsheet created at: {url}"
+        },
+        "step": {
+            "auth": {
+                "title": "Link Google Account"
+            },
+            "pick_implementation": {
+                "title": "Pick Authentication Method"
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/homeassistant/generated/application_credentials.py b/homeassistant/generated/application_credentials.py
index 4673cf2378d..fb2b04989f7 100644
--- a/homeassistant/generated/application_credentials.py
+++ b/homeassistant/generated/application_credentials.py
@@ -8,6 +8,7 @@ To update, run python3 -m script.hassfest
 APPLICATION_CREDENTIALS = [
     "geocaching",
     "google",
+    "google_sheets",
     "home_connect",
     "lametric",
     "lyric",
diff --git a/homeassistant/generated/config_flows.py b/homeassistant/generated/config_flows.py
index 60ac2e8d511..1aa49e279db 100644
--- a/homeassistant/generated/config_flows.py
+++ b/homeassistant/generated/config_flows.py
@@ -142,6 +142,7 @@ FLOWS = {
         "gogogate2",
         "goodwe",
         "google",
+        "google_sheets",
         "google_travel_time",
         "govee_ble",
         "gpslogger",
diff --git a/requirements_all.txt b/requirements_all.txt
index 3812c4fed8c..72c3c86d9e7 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -798,6 +798,9 @@ gridnet==4.0.0
 # homeassistant.components.growatt_server
 growattServer==1.2.2
 
+# homeassistant.components.google_sheets
+gspread==5.5.0
+
 # homeassistant.components.gstreamer
 gstreamer-player==1.1.2
 
diff --git a/tests/components/google_sheets/test_config_flow.py b/tests/components/google_sheets/test_config_flow.py
new file mode 100644
index 00000000000..3fcd2f99ed0
--- /dev/null
+++ b/tests/components/google_sheets/test_config_flow.py
@@ -0,0 +1,314 @@
+"""Test the Google Sheets config flow."""
+
+from collections.abc import Generator
+from unittest.mock import Mock, patch
+
+from gspread import GSpreadException
+import oauth2client
+import pytest
+
+from homeassistant import config_entries
+from homeassistant.components.application_credentials import (
+    ClientCredential,
+    async_import_client_credential,
+)
+from homeassistant.components.google_sheets.const import DOMAIN
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import config_entry_oauth2_flow
+from homeassistant.setup import async_setup_component
+
+from tests.common import MockConfigEntry
+
+CLIENT_ID = "1234"
+CLIENT_SECRET = "5678"
+SHEET_ID = "google-sheet-id"
+TITLE = "Google Sheets"
+
+
+@pytest.fixture
+async def setup_credentials(hass: HomeAssistant) -> None:
+    """Fixture to setup credentials."""
+    assert await async_setup_component(hass, "application_credentials", {})
+    await async_import_client_credential(
+        hass,
+        DOMAIN,
+        ClientCredential(CLIENT_ID, CLIENT_SECRET),
+    )
+
+
+@pytest.fixture(autouse=True)
+async def mock_client() -> Generator[Mock, None, None]:
+    """Fixture to setup a fake spreadsheet client library."""
+    with patch(
+        "homeassistant.components.google_sheets.config_flow.Client"
+    ) as mock_client:
+        yield mock_client
+
+
+async def test_full_flow(
+    hass: HomeAssistant,
+    hass_client_no_auth,
+    aioclient_mock,
+    current_request_with_host,
+    setup_credentials,
+    mock_client,
+) -> None:
+    """Check full flow."""
+    result = await hass.config_entries.flow.async_init(
+        "google_sheets", context={"source": config_entries.SOURCE_USER}
+    )
+    state = config_entry_oauth2_flow._encode_jwt(
+        hass,
+        {
+            "flow_id": result["flow_id"],
+            "redirect_uri": "https://example.com/auth/external/callback",
+        },
+    )
+
+    assert result["url"] == (
+        f"{oauth2client.GOOGLE_AUTH_URI}?response_type=code&client_id={CLIENT_ID}"
+        "&redirect_uri=https://example.com/auth/external/callback"
+        f"&state={state}&scope=https://www.googleapis.com/auth/drive.file"
+        "&access_type=offline&prompt=consent"
+    )
+
+    client = await hass_client_no_auth()
+    resp = await client.get(f"/auth/external/callback?code=abcd&state={state}")
+    assert resp.status == 200
+    assert resp.headers["content-type"] == "text/html; charset=utf-8"
+
+    # Prepare fake client library response when creating the sheet
+    mock_create = Mock()
+    mock_create.return_value.id = SHEET_ID
+    mock_client.return_value.create = mock_create
+
+    aioclient_mock.post(
+        oauth2client.GOOGLE_TOKEN_URI,
+        json={
+            "refresh_token": "mock-refresh-token",
+            "access_token": "mock-access-token",
+            "type": "Bearer",
+            "expires_in": 60,
+        },
+    )
+
+    with patch(
+        "homeassistant.components.google_sheets.async_setup_entry", return_value=True
+    ) as mock_setup:
+        result = await hass.config_entries.flow.async_configure(result["flow_id"])
+
+    assert len(hass.config_entries.async_entries(DOMAIN)) == 1
+    assert len(mock_setup.mock_calls) == 1
+    assert len(mock_client.mock_calls) == 2
+
+    assert result.get("type") == "create_entry"
+    assert result.get("title") == TITLE
+    assert "result" in result
+    assert result.get("result").unique_id == SHEET_ID
+    assert "token" in result.get("result").data
+    assert result.get("result").data["token"].get("access_token") == "mock-access-token"
+    assert (
+        result.get("result").data["token"].get("refresh_token") == "mock-refresh-token"
+    )
+
+
+async def test_create_sheet_error(
+    hass: HomeAssistant,
+    hass_client_no_auth,
+    aioclient_mock,
+    current_request_with_host,
+    setup_credentials,
+    mock_client,
+) -> None:
+    """Test case where creating the spreadsheet fails."""
+    result = await hass.config_entries.flow.async_init(
+        "google_sheets", context={"source": config_entries.SOURCE_USER}
+    )
+    state = config_entry_oauth2_flow._encode_jwt(
+        hass,
+        {
+            "flow_id": result["flow_id"],
+            "redirect_uri": "https://example.com/auth/external/callback",
+        },
+    )
+
+    assert result["url"] == (
+        f"{oauth2client.GOOGLE_AUTH_URI}?response_type=code&client_id={CLIENT_ID}"
+        "&redirect_uri=https://example.com/auth/external/callback"
+        f"&state={state}&scope=https://www.googleapis.com/auth/drive.file"
+        "&access_type=offline&prompt=consent"
+    )
+
+    client = await hass_client_no_auth()
+    resp = await client.get(f"/auth/external/callback?code=abcd&state={state}")
+    assert resp.status == 200
+    assert resp.headers["content-type"] == "text/html; charset=utf-8"
+
+    # Prepare fake exception creating the spreadsheet
+    mock_create = Mock()
+    mock_create.side_effect = GSpreadException()
+    mock_client.return_value.create = mock_create
+
+    aioclient_mock.post(
+        oauth2client.GOOGLE_TOKEN_URI,
+        json={
+            "refresh_token": "mock-refresh-token",
+            "access_token": "mock-access-token",
+            "type": "Bearer",
+            "expires_in": 60,
+        },
+    )
+
+    result = await hass.config_entries.flow.async_configure(result["flow_id"])
+    assert result.get("type") == "abort"
+    assert result.get("reason") == "create_spreadsheet_failure"
+
+
+async def test_reauth(
+    hass: HomeAssistant,
+    hass_client_no_auth,
+    aioclient_mock,
+    current_request_with_host,
+    setup_credentials,
+    mock_client,
+) -> None:
+    """Test the reauthentication case updates the existing config entry."""
+
+    config_entry = MockConfigEntry(
+        domain=DOMAIN,
+        unique_id=SHEET_ID,
+        data={
+            "token": {
+                "access_token": "mock-access-token",
+            },
+        },
+    )
+    config_entry.add_to_hass(hass)
+
+    config_entry.async_start_reauth(hass)
+    await hass.async_block_till_done()
+
+    flows = hass.config_entries.flow.async_progress()
+    assert len(flows) == 1
+    result = flows[0]
+    assert result["step_id"] == "reauth_confirm"
+
+    result = await hass.config_entries.flow.async_configure(result["flow_id"], {})
+    state = config_entry_oauth2_flow._encode_jwt(
+        hass,
+        {
+            "flow_id": result["flow_id"],
+            "redirect_uri": "https://example.com/auth/external/callback",
+        },
+    )
+    assert result["url"] == (
+        f"{oauth2client.GOOGLE_AUTH_URI}?response_type=code&client_id={CLIENT_ID}"
+        "&redirect_uri=https://example.com/auth/external/callback"
+        f"&state={state}&scope=https://www.googleapis.com/auth/drive.file"
+        "&access_type=offline&prompt=consent"
+    )
+    client = await hass_client_no_auth()
+    resp = await client.get(f"/auth/external/callback?code=abcd&state={state}")
+    assert resp.status == 200
+    assert resp.headers["content-type"] == "text/html; charset=utf-8"
+
+    # Config flow will lookup existing key to make sure it still exists
+    mock_open = Mock()
+    mock_open.return_value.id = SHEET_ID
+    mock_client.return_value.open_by_key = mock_open
+
+    aioclient_mock.post(
+        oauth2client.GOOGLE_TOKEN_URI,
+        json={
+            "refresh_token": "mock-refresh-token",
+            "access_token": "updated-access-token",
+            "type": "Bearer",
+            "expires_in": 60,
+        },
+    )
+
+    with patch(
+        "homeassistant.components.google_sheets.async_setup_entry", return_value=True
+    ) as mock_setup:
+        result = await hass.config_entries.flow.async_configure(result["flow_id"])
+
+    assert len(hass.config_entries.async_entries(DOMAIN)) == 1
+    assert len(mock_setup.mock_calls) == 1
+
+    assert result.get("type") == "abort"
+    assert result.get("reason") == "reauth_successful"
+
+    assert config_entry.unique_id == SHEET_ID
+    assert "token" in config_entry.data
+    # Verify access token is refreshed
+    assert config_entry.data["token"].get("access_token") == "updated-access-token"
+    assert config_entry.data["token"].get("refresh_token") == "mock-refresh-token"
+
+
+async def test_reauth_abort(
+    hass: HomeAssistant,
+    hass_client_no_auth,
+    aioclient_mock,
+    current_request_with_host,
+    setup_credentials,
+    mock_client,
+) -> None:
+    """Test failure case during reauth."""
+
+    config_entry = MockConfigEntry(
+        domain=DOMAIN,
+        unique_id=SHEET_ID,
+        data={
+            "token": {
+                "access_token": "mock-access-token",
+            },
+        },
+    )
+    config_entry.add_to_hass(hass)
+
+    config_entry.async_start_reauth(hass)
+    await hass.async_block_till_done()
+
+    flows = hass.config_entries.flow.async_progress()
+    assert len(flows) == 1
+    result = flows[0]
+    assert result["step_id"] == "reauth_confirm"
+
+    result = await hass.config_entries.flow.async_configure(result["flow_id"], {})
+    state = config_entry_oauth2_flow._encode_jwt(
+        hass,
+        {
+            "flow_id": result["flow_id"],
+            "redirect_uri": "https://example.com/auth/external/callback",
+        },
+    )
+    assert result["url"] == (
+        f"{oauth2client.GOOGLE_AUTH_URI}?response_type=code&client_id={CLIENT_ID}"
+        "&redirect_uri=https://example.com/auth/external/callback"
+        f"&state={state}&scope=https://www.googleapis.com/auth/drive.file"
+        "&access_type=offline&prompt=consent"
+    )
+    client = await hass_client_no_auth()
+    resp = await client.get(f"/auth/external/callback?code=abcd&state={state}")
+    assert resp.status == 200
+    assert resp.headers["content-type"] == "text/html; charset=utf-8"
+
+    # Simulate failure looking up existing spreadsheet
+    mock_open = Mock()
+    mock_open.return_value.id = SHEET_ID
+    mock_open.side_effect = GSpreadException()
+    mock_client.return_value.open_by_key = mock_open
+
+    aioclient_mock.post(
+        oauth2client.GOOGLE_TOKEN_URI,
+        json={
+            "refresh_token": "mock-refresh-token",
+            "access_token": "updated-access-token",
+            "type": "Bearer",
+            "expires_in": 60,
+        },
+    )
+
+    result = await hass.config_entries.flow.async_configure(result["flow_id"])
+    assert result.get("type") == "abort"
+    assert result.get("reason") == "open_spreadsheet_failure"
diff --git a/tests/components/google_sheets/test_init.py b/tests/components/google_sheets/test_init.py
new file mode 100644
index 00000000000..d060e01bac2
--- /dev/null
+++ b/tests/components/google_sheets/test_init.py
@@ -0,0 +1,214 @@
+"""Tests for Google Sheets."""
+
+from collections.abc import Awaitable, Callable, Generator
+import http
+import time
+from unittest.mock import patch
+
+import pytest
+
+from homeassistant.components.application_credentials import (
+    ClientCredential,
+    async_import_client_credential,
+)
+from homeassistant.components.google_sheets import DOMAIN
+from homeassistant.config_entries import ConfigEntryState
+from homeassistant.core import HomeAssistant
+from homeassistant.setup import async_setup_component
+
+from tests.common import MockConfigEntry
+from tests.test_util.aiohttp import AiohttpClientMocker
+
+TEST_SHEET_ID = "google-sheet-it"
+
+ComponentSetup = Callable[[], Awaitable[None]]
+
+
+@pytest.fixture(name="scopes")
+def mock_scopes() -> list[str]:
+    """Fixture to set the scopes present in the OAuth token."""
+    return ["https://www.googleapis.com/auth/drive.file"]
+
+
+@pytest.fixture(name="expires_at")
+def mock_expires_at() -> int:
+    """Fixture to set the oauth token expiration time."""
+    return time.time() + 3600
+
+
+@pytest.fixture(name="config_entry")
+def mock_config_entry(expires_at: int, scopes: list[str]) -> MockConfigEntry:
+    """Fixture for MockConfigEntry."""
+    return MockConfigEntry(
+        domain=DOMAIN,
+        unique_id=TEST_SHEET_ID,
+        data={
+            "auth_implementation": DOMAIN,
+            "token": {
+                "access_token": "mock-access-token",
+                "refresh_token": "mock-refresh-token",
+                "expires_at": expires_at,
+                "scope": " ".join(scopes),
+            },
+        },
+    )
+
+
+@pytest.fixture(name="setup_integration")
+async def mock_setup_integration(
+    hass: HomeAssistant, config_entry: MockConfigEntry
+) -> Generator[ComponentSetup, None, None]:
+    """Fixture for setting up the component."""
+    config_entry.add_to_hass(hass)
+
+    assert await async_setup_component(hass, "application_credentials", {})
+    await async_import_client_credential(
+        hass,
+        DOMAIN,
+        ClientCredential("client-id", "client-secret"),
+        DOMAIN,
+    )
+
+    async def func() -> None:
+        assert await async_setup_component(hass, DOMAIN, {})
+        await hass.async_block_till_done()
+
+    yield func
+
+    # Verify clean unload
+    entries = hass.config_entries.async_entries(DOMAIN)
+    assert len(entries) == 1
+    await hass.config_entries.async_unload(entries[0].entry_id)
+    await hass.async_block_till_done()
+
+    assert not hass.data.get(DOMAIN)
+    assert entries[0].state is ConfigEntryState.NOT_LOADED
+
+
+async def test_setup_success(
+    hass: HomeAssistant, setup_integration: ComponentSetup
+) -> None:
+    """Test successful setup and unload."""
+    await setup_integration()
+
+    entries = hass.config_entries.async_entries(DOMAIN)
+    assert len(entries) == 1
+    assert entries[0].state is ConfigEntryState.LOADED
+
+
+@pytest.mark.parametrize(
+    "scopes",
+    [
+        [],
+        [
+            "https://www.googleapis.com/auth/drive.file+plus+extra"
+        ],  # Required scope is a prefix
+        ["https://www.googleapis.com/auth/drive.readonly"],
+    ],
+    ids=["no_scope", "required_scope_prefix", "other_scope"],
+)
+async def test_missing_required_scopes_requires_reauth(
+    hass: HomeAssistant, setup_integration: ComponentSetup
+) -> None:
+    """Test that reauth is invoked when required scopes are not present."""
+    await setup_integration()
+
+    entries = hass.config_entries.async_entries(DOMAIN)
+    assert len(entries) == 1
+    assert entries[0].state is ConfigEntryState.SETUP_ERROR
+
+    flows = hass.config_entries.flow.async_progress()
+    assert len(flows) == 1
+    assert flows[0]["step_id"] == "reauth_confirm"
+
+
+@pytest.mark.parametrize("expires_at", [time.time() - 3600], ids=["expired"])
+async def test_expired_token_refresh_success(
+    hass: HomeAssistant,
+    setup_integration: ComponentSetup,
+    scopes: list[str],
+    aioclient_mock: AiohttpClientMocker,
+) -> None:
+    """Test expired token is refreshed."""
+
+    aioclient_mock.post(
+        "https://oauth2.googleapis.com/token",
+        json={
+            "access_token": "updated-access-token",
+            "refresh_token": "updated-refresh-token",
+            "expires_at": time.time() + 3600,
+            "expires_in": 3600,
+        },
+    )
+
+    await setup_integration()
+
+    entries = hass.config_entries.async_entries(DOMAIN)
+    assert len(entries) == 1
+    assert entries[0].state is ConfigEntryState.LOADED
+    assert entries[0].data["token"]["access_token"] == "updated-access-token"
+    assert entries[0].data["token"]["expires_in"] == 3600
+
+
+@pytest.mark.parametrize(
+    "expires_at,status,expected_state",
+    [
+        (
+            time.time() - 3600,
+            http.HTTPStatus.UNAUTHORIZED,
+            ConfigEntryState.SETUP_ERROR,
+        ),
+        (
+            time.time() - 3600,
+            http.HTTPStatus.INTERNAL_SERVER_ERROR,
+            ConfigEntryState.SETUP_RETRY,
+        ),
+    ],
+    ids=["failure_requires_reauth", "transient_failure"],
+)
+async def test_expired_token_refresh_failure(
+    hass: HomeAssistant,
+    setup_integration: ComponentSetup,
+    scopes: list[str],
+    aioclient_mock: AiohttpClientMocker,
+    status: http.HTTPStatus,
+    expected_state: ConfigEntryState,
+) -> None:
+    """Test failure while refreshing token with a transient error."""
+
+    aioclient_mock.post(
+        "https://oauth2.googleapis.com/token",
+        status=status,
+    )
+
+    await setup_integration()
+
+    # Verify a transient failure has occurred
+    entries = hass.config_entries.async_entries(DOMAIN)
+    assert entries[0].state is expected_state
+
+
+async def test_append_sheet(
+    hass: HomeAssistant,
+    setup_integration: ComponentSetup,
+    config_entry: MockConfigEntry,
+) -> None:
+    """Test successful setup and unload."""
+    await setup_integration()
+
+    entries = hass.config_entries.async_entries(DOMAIN)
+    assert len(entries) == 1
+    assert entries[0].state is ConfigEntryState.LOADED
+
+    with patch("homeassistant.components.google_sheets.Client") as mock_client:
+        await hass.services.async_call(
+            DOMAIN,
+            "append_sheet",
+            {
+                "config_entry": config_entry.entry_id,
+                "worksheet": "Sheet1",
+                "data": {"foo": "bar"},
+            },
+            blocking=True,
+        )
+    assert len(mock_client.mock_calls) == 8