Map Showing Contra Costa County, California
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Contra Costa County, California Page
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Population: 1,078,257
Area: 715.94 square miles
County Seat: Martinez
Area Code(s): 925 510
Time Zone: PST
See our maps for adjacent jurisdictions:
Alameda
Marin
Sacramento
San Francisco
San Joaquin
San Mateo
Santa Clara
Solano