Contra Costa County Board of Supervisors
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. Members of the Board of supervisors are elected from districts, based on their residence. Members. As of May 4, 2018, the current supervisors for each district are: District Composition. Contra Costa County is divided in to five districts, each representing different communities within the county. Their composition is as follows: