History Center

Mike McCarron, Exec. Director

No other Society activity generates so much interest and involvement as the History Center archives. Long a dream of the organization, the facility's first home was established in the spring of 1984 at the Oak Park Center in Pleasant Hill, California. In May 2000 the History Center moved to 610 Main Street in Martinez, California, and we have been in our current location at 724 Escobar Street in Martinez since January, 2013.

An Overview of our Collections

The Contra Costa County History Center collection consists of records and artifacts concerning the history of Contra Costa County, California. A large part of the collection includes early county court and probate records, naturalization records, supervisor records, tax assessor records; maps, photographs, newspapers and newspaper clippings, and special collections of some prominent local government officials and historians.

The first major acquisition was that of the collection of photographer and pharmacist, Louis L. Stein, who was one of the founding members of the Society. This collection was extensive and provided the foundation for the archives.

The collection includes such categories as:

New collections are continuously being added. The Special Collections can be searched in detail at the Online Archive of California by clicking here.

History Center Hours of Operation and Contact Information

The Contra Costa County Historical Society's History Center is located at:
724 Escobar St.
Martinez, CA 94553
Phone: 925-229-1042
Our normal hours of operation are:

From time to time, we may be open for special events, such as exhibit open houses, or if there is an event in downtown Martinez.

Remember, we are staffed largely by volunteers, so we may not always be open the entire time. To be sure we are open, please call ahead. We are also available via email at "info@cocohistory.org".

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