Preserve, protect, and provide public

access to the records and heritage of

Contra Costa County.

join & support

History inside.

Welcome to the Contra Costa County Historical Society

Exterior signage for the History Center.

Visit the History Center

A place where unique discoveries of the past are found every day. What will you find today?

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Mt Diablo from Green & Stone Valley Roads, 1937

Research the Collection

Explore the vast collections found only at the Contra Costa County History Center.

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Postcard of Southern Pacific Railroad Ferry 'Solano'  c1910

Contra Costa County History

Discover the history of Contra Costa County: its people, its places, its stories.

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