510 Area Code

The 510 area code is found in the state of California, and spans 17 different Counties. Listed below are the 17 Counties that reside inside of the 510 area code. Included under the Counties are the cities within the given County.
Alameda County California
Alameda, Albany, Berkeley, Castro Valley, Dublin, Emeryville, Fremont, Hayward, Livermore, Newark, Oakland, Piedmont, Pleasanton, San Leandro, San Lorenzo, Union City
Contra Costa County California
Alamo, Antioch, Concord, Crockett, Danville, El Cerrito, El Sobrante, Hercules, Knightsen, Lafayette, Martinez, Orinda, Pinole, Pittsburg, Port Costa, Richmond, Rodeo, San Pablo, San Ramon, Walnut Creek
El Dorado County California
El Dorado Hills
Humboldt County California
Eureka
Los Angeles County California
Los Angeles
Marin County California
Corte Madera, Mill Valley
Napa County California
Napa
Orange County California
Garden Grove, Irvine
Sacramento County California
Sacramento
San Diego County California
San Diego
San Francisco County California
San Francisco
San Joaquin County California
Stockton, Tracy
San Mateo County California
Daly City, Menlo Park, San Carlos
Santa Clara County California
Milpitas, Palo Alto, San Jose, Sunnyvale
Santa Cruz County California
Watsonville
Solano County California
Benicia, Fairfield, Rio Vista, Vallejo
Stanislaus County California
Turlock