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Located in historic downtown Martinez, the County History Center is open to the public.

The History Center is designed to be primarily a living archive - a treasure trove of the records, letters, pictures, maps and books that tell the story of our past.

In addition to serving as a place where County history is collected and preserved, the Center also serves as a place where residents and former residents may donate their photographs, letters and documents for consideration to be added to the Society’s collection.

Accessible entry is available during regular business hours.

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


724 Escobar Street
Martinez, CA 94533


925-229-1772 (Fax)


On-street metered parking, plus a public parking lot with pay stations at the corner of Ferry and Escobar Streets.


The ground-level wheelchair accessible entrance is located on the left side of our building. For access, press the doorbell upon arrival.

Public Transit

Amtrak Martinez Station is three blocks from our door. BART does not serve Martinez but there are bus routes from some BART stations.

Bus routes to downtown Martinez are operated by: