Cities and Towns in Contra Costa County, California

Founded in 1850, Contra Costa County is one of 58 counties in the state of California. The city of Martinez is the county seat. With FIPS code of 13, Contra Costa County has a population of 1,161,413 and area of 720 square miles (1,865 km²).

List of all cities in Contra Costa County, CA alphabetically

City/Town	Postal Code	Area Code
Alamo, CA	94507	925
Antioch, CA	94509	925
	94531	925
Bay Point, CA	94565	925
Bethel Island, CA	94511	925
Blackhawk, CA	94506	925
Brentwood, CA	94513	925
Briones, CA	94553	925
Byron, CA	94505	510
	94514	925
Canyon, CA	94516	925
Chevron, CA	94529	925
Chevron USA Inc, CA	94529	925
Clayton, CA	94517	925
Clyde, CA	94520	925
Concord, CA	94518	925
	94519	925
	94520	925
	94521	925
	94522	925
	94523	925
	94524	925
	94527	925
	94529	925
Crockett, CA	94525	510
Danville, CA	94506	925
	94526	925
Diablo, CA	94528	925
Discovery Bay, CA	94505	510
Discovery Bay, CA	94514	925
El Cerrito, CA	94530	510
El Sobrante, CA	94803	510
	94820	510
Hercules, CA	94547	510
Hilltop Mall, CA	94806	510
Knightsen, CA	94548	510
Lafayette, CA	94549	925
	94596	925
Martinez, CA	94553	925
Moraga, CA	94556	925
	94570	925
	94575	925
North Richmond, CA	94801	510
Oakley, CA	94561	925
Orinda, CA	94563	925
Pacheco, CA	94553	925
Pinole, CA	94564	510
Pittsburg, CA	94565	925
Pleasant Hill, CA	94523	925
Point Richmond, CA	94801	510
Port Chicago, CA	94565	925
Port Costa, CA	94569	510
Richmond, CA	94801	510
	94802	510
	94803	510
	94804	510
	94805	510
	94806	510
	94807	510
	94808	510
	94820	510
	94850	510
Rodeo, CA	94547	510
	94572	510
San Pablo, CA	94803	510
	94806	510
San Ramon, CA	94582	925
	94583	925
Tara Hills, CA	94806	510
Walnut Creek, CA	94595	925
	94596	925
	94597	925
	94598	925
West Pittsburg, CA	94565	925

Map of Cities in Contra Costa County, CA