100 Largest ZIP Codes in the United States by Population in Contra Costa County, California
Explore the 100 largest ZIP codes in the United States ranked by population using U.S. Census demographic data. This page lists ZIP codes located in Contra Costa County, California.
| Rank | ZIP Code | City | State | Population |
|---|---|---|---|---|
| 1 | 94565 | PITTSBURG | CA | 100,826 |
| 2 | 94509 | ANTIOCH | CA | 70,889 |
| 3 | 94513 | BRENTWOOD | CA | 67,580 |
| 4 | 94806 | SAN PABLO | CA | 63,730 |
| 5 | 94553 | MARTINEZ | CA | 49,062 |
| 6 | 94582 | SAN RAMON | CA | 47,338 |
| 7 | 94561 | OAKLEY | CA | 44,546 |
| 8 | 94804 | RICHMOND | CA | 44,387 |
| 9 | 94531 | ANTIOCH | CA | 44,115 |
| 10 | 94521 | CONCORD | CA | 41,092 |
| 11 | 94583 | SAN RAMON | CA | 39,758 |
| 12 | 94520 | CONCORD | CA | 36,699 |
| 13 | 94523 | PLEASANT HILL | CA | 34,964 |
| 14 | 94526 | DANVILLE | CA | 33,396 |
| 15 | 94801 | RICHMOND | CA | 32,759 |
| 16 | 94549 | LAFAYETTE | CA | 28,456 |
| 17 | 94518 | CONCORD | CA | 28,287 |
| 18 | 94803 | EL SOBRANTE | CA | 27,171 |
| 19 | 94506 | DANVILLE | CA | 26,947 |
| 20 | 94530 | EL CERRITO | CA | 26,483 |
| 21 | 94598 | WALNUT CREEK | CA | 26,346 |
| 22 | 94547 | HERCULES | CA | 26,041 |
| 23 | 94596 | WALNUT CREEK | CA | 23,795 |
| 24 | 94597 | WALNUT CREEK | CA | 23,654 |
| 25 | 94519 | CONCORD | CA | 20,162 |
| 26 | 94563 | ORINDA | CA | 19,416 |
| 27 | 94564 | PINOLE | CA | 18,946 |
| 28 | 94595 | WALNUT CREEK | CA | 17,341 |
| 29 | 94556 | MORAGA | CA | 15,959 |
| 30 | 94505 | DISCOVERY BAY | CA | 15,445 |
| 31 | 94805 | RICHMOND | CA | 14,790 |
| 32 | 94507 | ALAMO | CA | 14,503 |
| 33 | 94517 | CLAYTON | CA | 12,349 |
| 34 | 94572 | RODEO | CA | 9,309 |
| 35 | 94525 | CROCKETT | CA | 3,599 |
| 36 | 94514 | BYRON | CA | 2,023 |
| 37 | 94511 | BETHEL ISLAND | CA | 1,993 |
| 38 | 94575 | MORAGA | CA | 1,048 |
| 39 | 94528 | DIABLO | CA | 726 |
| 40 | 94548 | KNIGHTSEN | CA | 598 |
| 41 | 94569 | PORT COSTA | CA | 251 |
| 42 | 94516 | CANYON | CA | 212 |