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Contra Costa County Historical Society
724 Escobar St
Martinez, CA 94553

925-229-1772 (Fax)

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.

Preserve, protect, and provide public access to the records and heritage of Contra Costa County.

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Contra Costa County Historical Society