There are 43 zip codes in Contra Costa County, California. The most populated is 94565, located in Pittsburg. * 2024 populations estimated based on the latest ACS 5-year data.
Zip Code | Population | City |
|---|---|---|
| 94565 | 100,826 | Pittsburg |
| 94509 | 70,889 | Antioch |
| 94513 | 67,580 | Brentwood |
| 94806 | 63,730 | San Pablo |
| 94553 | 49,062 | Martinez |
| 94582 | 47,338 | San Ramon |
| 94561 | 44,546 | Oakley |
| 94804 | 44,387 | Richmond |
| 94531 | 44,115 | Antioch |
| 94521 | 41,092 | Concord |
| 94583 | 39,758 | San Ramon |
| 94520 | 36,699 | Concord |
| 94523 | 34,964 | Pleasant Hill |
| 94526 | 33,396 | Danville |
| 94801 | 32,759 | Richmond |
| 94549 | 28,456 | Lafayette |
| 94518 | 28,287 | Concord |
| 94803 | 27,171 | El Sobrante |
| 94506 | 26,947 | Danville |
| 94530 | 26,483 | El Cerrito |
| 94598 | 26,346 | Walnut Creek |
| 94547 | 26,041 | Hercules |
| 94596 | 23,795 | Walnut Creek |
| 94597 | 23,654 | Walnut Creek |
| 94519 | 20,162 | Concord |
| 94563 | 19,416 | Orinda |
| 94564 | 18,946 | Pinole |
| 94595 | 17,341 | Walnut Creek |
| 94556 | 15,959 | Moraga |
| 94505 | 15,445 | Discovery Bay |
| 94805 | 14,790 | Richmond |
| 94507 | 14,503 | Alamo |
| 94517 | 12,349 | Clayton |
| 94708 | 11,810 | Berkeley |
| 94572 | 9,309 | Rodeo |
| 94525 | 3,599 | Crockett |
| 94514 | 2,023 | Byron |
| 94511 | 1,993 | Bethel Island |
| 94575 | 1,048 | Moraga |
| 94528 | 726 | Diablo |
| 94548 | 598 | Knightsen |
| 94569 | 251 | Port Costa |
| 94516 | 212 | Canyon |