Contra Costa County
Contra Costa County is a county located in the U.S. state of California, in the East Bay of the San Francisco Bay Area. As of the 2020 United States census, the population was 1,165,927. The county seat is Martinez. It occupies the northern portion of the East Bay region of the San Francisco Bay Area and is primarily suburban. The county's name refers to its position on the other side of the bay from San Francisco. Contra Costa County is included in the San Francisco–Oakland–Berkeley, CA Metropolitan Statistical Area.
Governance bodies
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Cities and towns 19
- City of Antioch pop. 114,794
- City of Brentwood pop. 64,870
- City of Clayton pop. 10,973
- City of Concord pop. 124,074
- City of El Cerrito pop. 25,845
- City of Hercules pop. 26,091
- City of Lafayette pop. 25,208
- City of Martinez pop. 36,819
- City of Oakley pop. 43,771
- City of Orinda pop. 19,483
- City of Pinole pop. 18,821
- City of Pittsburg pop. 76,544
- City of Pleasant Hill pop. 34,304
- City of Richmond pop. 115,639
- City of San Pablo pop. 31,773
- City of San Ramon pop. 86,947
- City of Walnut Creek pop. 69,695
- Town of Danville pop. 43,240
- Town of Moraga pop. 16,624
Reference data (Census of Governments 2022)
- Census ID (PID6)
- 161097
- FIPS state
- 06
- FIPS county
- 013
- FIPS place
- 99013
- Census record name
- COUNTY OF CONTRA COSTA
- Mailing address
- 651 PINE ST, MARTINEZ 94553