Contra Costa County, California ZIP Codes
- ZIP records
43 - Cities represented
31 - Sum of listed ZIP population estimates
1,171,369
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 94565 | Pittsburg | 100,488 |
| 2 | 94509 | Antioch | 70,090 |
| 3 | 94513 | Brentwood | 69,755 |
| 4 | 94806 | San Pablo | 62,546 |
| 5 | 94553 | Martinez | 48,643 |
| 6 | 94582 | San Ramon | 47,424 |
| 7 | 94531 | Antioch | 46,387 |
| 8 | 94561 | Oakley | 46,368 |
| 9 | 94804 | Richmond | 44,891 |
| 10 | 94521 | Concord | 41,909 |
Cities in Contra Costa County
- Alamo
- Antioch
- Berkeley
- Bethel Island
- Brentwood
- Byron
- Canyon
- Clayton
- Concord
- Crockett
- Danville
- Diablo
- Discovery Bay
- El Cerrito
- El Sobrante
- Hercules
- Knightsen
- Lafayette
- Martinez
- Moraga
- Oakley
- Orinda
- Pinole
- Pittsburg
- Pleasant Hill
- Port Costa
- Richmond
- Rodeo
- San Pablo
- San Ramon
- Walnut Creek
ZIP Directory
- ZIP 94505
- ZIP 94506
- ZIP 94507
- ZIP 94509
- ZIP 94511
- ZIP 94513
- ZIP 94514
- ZIP 94516
- ZIP 94517
- ZIP 94518
- ZIP 94519
- ZIP 94520
- ZIP 94521
- ZIP 94523
- ZIP 94525
- ZIP 94526
- ZIP 94528
- ZIP 94530
- ZIP 94531
- ZIP 94547
- ZIP 94548
- ZIP 94549
- ZIP 94553
- ZIP 94556
- ZIP 94561
- ZIP 94563
- ZIP 94564
- ZIP 94565
- ZIP 94569
- ZIP 94572
- ZIP 94575
- ZIP 94582
- ZIP 94583
- ZIP 94595
- ZIP 94596
- ZIP 94597
- ZIP 94598
- ZIP 94708
- ZIP 94801
- ZIP 94803
- ZIP 94804
- ZIP 94805
- ZIP 94806
Browse all ZIP data for California
Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.