- Contra Costa County Superior Court Probate Division
- 2401 Salvio Street
- Martinez, CA 94553
- (925) 313-4401
Additionally, you may be able to find information on last wills and testaments filed with the county online. The State of California has a website dedicated to providing access to probate and guardianship information, including last wills and testaments:
- (https://www.courts.ca.gov/probategenealogy-contra-costa.htm)