The Contra Costa County Board of Supervisors is the governing body for Contra Costa County, California, in the San Francisco Bay Area's East Bay region.^[1] Members of the Board of supervisors are elected from districts, based on their residence.

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As of May 4, 2018, the current supervisors^[1] for each district are:

• District 1: John Gioia, Chair^[2][3]
• District 2: Candace Andersen,
• District 3: Diane Burgis
• District 4: Karen Mitchoff
• District 5: Federal Glover Vice Chair

Contra Costa County is divided in to five districts, each representing different communities within the county.^[4] Their composition is as follows:

• District 1: Richmond, San Pablo, El Cerrito, part of Pinole, and the unincorporated communities of East Richmond Heights, El Sobrante, Kensington, Montalvin Manor, Tara Hills, North Richmond, and Rollingwood.^[5]
• District 2: San Ramon, Danville, Alamo, Lafayette, Moraga, Orinda, Canyon, Rossmoor, Parkmead, Saranap and a portion of Walnut Creek.^[6]
• District 3: Bethel Island, Blackhawk, Byron, Diablo, Discovery Bay and Knightsen, as well as the cities of Antioch, Brentwood, and Oakley.^[7]
• District 4: Clayton, Concord, Pleasant Hill, part of Walnut Creek, and the unincorporated Contra Costa Centre.^[8]
• District 5: Hercules, Martinez, Pittsburg, portions of Pinole and Antioch, and the unincorporated communities of Alhambra Valley, Bay Point, Briones, Rodeo, Pacheco, Crockett, Tormey, Port Costa, Mt. View, Vine Hill, Reliez Valley, and Clyde.^[9]