Explore Brentwood local geography, civic resources and voter guides, with dated official population and registration facts for Contra Costa County.
At a glance: Brentwood is an incorporated city in Contra Costa County. Population: 66,070 (California Department of Finance estimate as of January 1, 2026). Registered voters: 44,062 (California Secretary of State, as of September 4, 2026).
Brentwood occupies eastern Contra Costa County's inland agricultural plain, where residential neighborhoods meet the orchards and farms associated with the surrounding region. Its downtown civic core remains distinct from the larger shopping corridors and newer neighborhoods beyond it. City Park and the Brentwood Community Center form a connected downtown gathering place. The community center's banquet room opens toward the park, while meeting rooms and public gathering areas support activities beyond outdoor recreation. Brentwood incorporated on January 21, 1948. It is a general-law city operating under council-manager government, with municipal policy set by the council and daily administration directed by the city manager.
Yes. The city publishes rental information for banquet, multipurpose, and conference spaces at the community center.
Yes. Its first-floor banquet room opens directly toward City Park.
Contra Costa County Elections provides voter registration, ballot, and voting-location information.
44,062 (California Secretary of State, as of September 4, 2026).
CA Slates began with shared voter guides in 2012 and expanded into its current publication family and connected program.