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  5. Area Code 510

Where Is Area Code 510?

Area code 510 is found in the US state of California. Primarily servicing the city of Oakland (population: 392681), area code 510 covers 2 counties of California.

Located in the Pacific time zone, area code 510 is on the same time as Los Angeles, CA.

Area code 510 was brought into effect on September 2, 1991. 510 was split from the parent 415 area code.

Map of California with area code 510 highlighted

Counties in Area Code 510

  • Alameda,
  • Contra Costa.

Most Populous Cities in Area Code 510

City County City Population Time Zone
Oakland Alameda 392,681 PST
Fremont Alameda 220,411 PST
Hayward Alameda 182,295 PST
Berkeley Alameda 122,077 PST
San Leandro Alameda 107,768 PST
Richmond Contra Costa 83,978 PST
Alameda Alameda 75,984 PST
Union City Alameda 71,561 PST
San Pablo Contra Costa 61,605 PST
Castro Valley Alameda 58,330 PST
Newark Alameda 43,825 PST
Emeryville Alameda 28,843 PST
San Lorenzo Alameda 27,951 PST
El Sobrante Contra Costa 25,629 PST
Hercules Contra Costa 24,794 PST
El Cerrito Contra Costa 24,572 PST
Albany Alameda 20,192 PST
Pinole Contra Costa 18,819 PST
Rodeo Contra Costa 8,937 PST
Crockett Contra Costa 3,218 PST

Note: The above list is based off of the top 25 most populous cities in the area code as per 2012 United States Census Bureau estimates.

View all United States Area Codes.

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This page was last updated on July 3, 2015.