Contra Costa County
California Map Showing Conta Costa County
Marin (west, separated by San Pablo Bay & Central San Francisco Bay)
A Brief History
Contra Costa County was one of the original 27 counties of California, created in 1850 at the time of statehood. The county was originally to be called Mt. Diablo County, but the name was changed prior to incorporation as a county. The county's Spanish language name means opposite coast, because of its location opposite San Francisco, in an easterly direction, on San Francisco Bay. Southern portions of the county's territory, including all of the bayside portions opposite San Francisco and northern portions of Santa Clara County, were given up to form Alameda County effective March 25, 1853.
The land titles in Contra Costa County may be traced to multiple subdivisions of a few original land grants. The grantee's family names live on in a few city and town names such as Martinez, Pacheco and Moraga and in the names of streets, residential subdivisions, and business parks. A few mansions from the more prosperous farms have been preserved as museums and cultural centers and one of the more rustic examples, the Borges Ranch, has been preserved as a working demonstration ranch.
Contra Costa County Clerk/Recorder's Office For Contra Costa County vital records.
My name is Linda Brown and I have been the Contra Costa County CAGenWeb Coordinator since 2004. I would like to take this opportunity to thank the previous coordinators of this site, Laurel Egenberger (1996-2004) and Jamie Frame (2004), for their time and contributions. Please feel free to contact me with any questions or concerns that you may have. I am NOT able to perform local lookups.
If you are interested in becoming a coordinator, or in any other way assisting The CAGenWeb Project, please visit the CAGenWeb Counties page and the CAGenWeb Policies and Procedures page and then contact one of the following individuals:
This page was last modified on 27 Jan 2019.
© 2019 Linda Brown on behalf of The CAGenWeb Project. All Rights Reserved.