The mission of the Contra Costa County Historical Society is to preserve, protect, and provide public access to the records and heritage of Contra Costa County, CA.
The Contra Costa County Historical Society was established as a 501(c)3 non-profit educational organization in 1951 and incorporated in 1972 for the purpose of discovering, preserving, and sharing knowledge about the history of Contra Costa County. Since 1980, the Society has maintained the Contra CostamCounty History Center for public access and use of its marvelous archive of historical records of people andevents in the county. The History Center archives contain a vast number of unique historical records thatpreserve and document Contra Costa's history, with documents from the 1830s onward. In addition, the Superior Court has designated the Society the repository of its official historical court records.