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 ...
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Contra Costa County is a county in the state of California. It is in the United States. As of the 2020 census, the population was 1,165,927. The county seat ...
Contra Costa refers to Contra Costa County, California and many things within or adjacent to its borders, including: ...
O · Oakley, California · Orinda, California. P. Pinole, California · Pittsburg, California · Pleasant Hill, California ...
East of the Oakland Hills that border the East Bay, Contra Costa County maintains a very separate culture and lifestyle than its Bay Area neighbors.
C · California's 3rd senatorial district · California's 5th congressional district · California's 7th senatorial district · California's 9th congressional ...
Contra Costa County is home to 19 cities and numerous unincorporated communities. See the County Supervisorial Districts map. For more information about ...