There are several websites that can help you find the county you are in based on your zip code. Here are some options:

1. California Volunteers: This website allows you to enter your zip code and find your California county by name. The results are displayed in a table that includes the zip code, city, and county name.

2. USCounties.com: This website offers a zip code lookup tool that allows you to search for a zip code by city, county, or state. Once you enter the zip code, the website will display the corresponding city and county name.

3. GPS Coordinates: This website offers a "What County am I in" tool that can look up a county by any zip code, address, or GPS coordinates. Simply enter your zip code and hit the "get county by zip code" button, and it will return the county name. The website also offers additional information such as your current address, latitude and longitude, and a map of the area.

Overall, these websites can help you quickly and easily find the county you are in based on your zip code.