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Business Hours

Tuesday, Wednesday and Thursday
9 a.m. to 4 p.m.

1st and 3rd Saturdays of the month
10 a.m. to 2 p.m.

The History Center is closed the last two weeks of December and reopens the first Tuesday of January.

If you are coming for research, we strongly suggest you make an appointment so we can ensure the appropriate staff person will be here to assist you.  For appointments call (925) 229-1042 or email

Research Inquiries

For research inquiries, please complete our online inquiry form.


925-229-1772 (Fax)


724 Escobar St
Martinez, CA 94553

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