Contra Costa County, CA Area Codes

Time in Contra Costa County, California
04:45:56 AM
Time in Contra Costa County, California
  • State: California
  • County: Contra Costa County
  • County Seat: Martinez
  • FIPS: 06013
  • Founded in: 1850
  • Population: 1,150,215
  • Density: 1,604 Persons/Square Mile
  • Area: 717 Square Miles
  • Government Type: County
  • Authority: Dillon's Rule
  • Legislative Body: Board of Supervisors
  • Legislative Body Size: 5
  • County Contact: 651 Pine Street
    Martinez, CA
  • County site: http://www.co.contra-costa.ca.us
  • Labor Force: 564,570
  • Unemployment Rate: 3.20%
  • Gross Domestic Product (GDP): $77.5 B

Area codes of Contra Costa County

510 707 925

Top Phone Prefixes of Contra Costa County

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Contra Costa County Cities

Neighbor Counties