Contra Costa County, California ZIP codes
53 ZIP codes are in Contra Costa County, plus 6 that cross in from neighboring counties. It's part of the San Francisco-Oakland-Fremont, CA metro area.
- ZIP codes
- 53
- Population in these ZIPs
- 1,171,369
- Avg. median income
- $137,300population-weighted
- Cities & towns
- 31
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Contra Costa County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 94505 | Discovery Bay | 14,970 | $146,480 | $773,800 |
| 94506 | Danville | 27,055 | $250,001 | $1,982,700 |
| 94507 | Alamo | 14,586 | $250,001 | $2,532,500 |
| 94509 | Antioch | 70,090 | $86,196 | $536,300 |
| 94511 | Bethel Island | 1,864 | $74,972 | $626,500 |
| 94513 | Brentwood | 69,755 | $142,223 | $781,500 |
| 94514 | Byron | 1,953 | $76,511 | $839,600 |
| 94516 | Canyon | 214 | $113,333 | $784,700 |
| 94517 | Clayton | 12,316 | $168,921 | $1,027,300 |
| 94518 | Concord | 27,345 | $112,094 | $825,100 |
| 94519 | Concord | 19,058 | $122,418 | $709,100 |
| 94520 | Concord | 37,381 | $82,479 | $600,600 |
| 94521 | Concord | 41,909 | $125,899 | $772,000 |
| 94522 PO Box | Concord | — | — | — |
| 94523 | Pleasant Hill | 34,592 | $142,586 | $968,500 |
| 94524 PO Box | Concord | — | — | — |
| 94525 | Crockett | 3,372 | $110,899 | $659,100 |
| 94526 | Danville | 32,584 | $225,097 | $1,711,400 |
| 94527 PO Box | Concord | — | — | — |
| 94528 | Diablo | 1,049 | $207,500 | $3,107,100 |
| 94529 PO Box | Concord | — | — | — |
| 94530 | El Cerrito | 26,401 | $128,529 | $1,119,700 |
| 94531 | Antioch | 46,387 | $120,927 | $658,400 |
| 94547 | Hercules | 26,302 | $129,397 | $735,600 |
| 94548 | Knightsen | 832 | $189,653 | $959,900 |
| 94549 | Lafayette | 28,420 | $234,516 | $1,910,600 |
| 94553 | Martinez | 48,643 | $124,130 | $749,500 |
| 94556 | Moraga | 15,998 | $215,720 | $1,604,400 |
| 94561 | Oakley | 46,368 | $134,678 | $653,800 |
| 94563 | Orinda | 19,378 | $250,001 | $1,944,000 |
| 94564 | Pinole | 18,761 | $127,717 | $716,200 |
| 94565 | Pittsburg | 100,488 | $95,556 | $559,200 |
| 94569 | Port Costa | 296 | $38,929 | $656,500 |
| 94570 PO Box | Moraga | — | — | — |
| 94572 | Rodeo | 8,976 | $91,484 | $646,800 |
| 94575 | Moraga | 975 | — | — |
| 94582 | San Ramon | 47,424 | $214,677 | $1,664,500 |
| 94583 | San Ramon | 39,583 | $184,898 | $1,331,900 |
| 94595 | Walnut Creek | 16,988 | $100,552 | $665,900 |
| 94596 | Walnut Creek | 23,417 | $135,635 | $1,064,400 |
| 94597 | Walnut Creek | 23,129 | $132,063 | $972,200 |
| 94598 | Walnut Creek | 27,206 | $186,225 | $1,369,600 |
| 94708 | Berkeley | 11,947 | $234,923 | $1,627,200 |
| 94801 | Richmond | 33,591 | $81,728 | $506,900 |
| 94802 PO Box | Richmond | — | — | — |
| 94803 | El Sobrante | 27,659 | $118,447 | $726,100 |
| 94804 | Richmond | 44,891 | $91,037 | $566,500 |
| 94805 | Richmond | 14,670 | $111,152 | $693,900 |
| 94806 | San Pablo | 62,546 | $86,034 | $571,400 |
| 94807 PO Box | Richmond | — | — | — |
| 94808 PO Box | Richmond | — | — | — |
| 94820 PO Box | El Sobrante | — | — | — |
| 94850 PO Box | Richmond | — | — | — |
ZIP codes partly in Contra Costa County
These ZIP codes are mostly in a neighboring county but cover part of Contra Costa County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 94551 | Livermore | Alameda County | 37,885 | $145,392 | $963,200 |
| 94588 | Pleasanton | Alameda County | 34,328 | $191,073 | $1,352,000 |
| 94611 | Oakland | Alameda County | 40,116 | $180,549 | $1,409,500 |
| 94706 | Albany | Alameda County | 19,969 | $143,398 | $1,241,700 |
| 94707 | Berkeley | Alameda County | 12,811 | $212,776 | $1,775,000 |
| 95219 | Stockton | San Joaquin County | 31,713 | $112,268 | $540,700 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Contra Costa County
Nearby counties
Frequently asked questions
How many ZIP codes are in Contra Costa County, California?
53 ZIP codes are mainly in Contra Costa County, and 6 more ZIP codes from neighboring areas reach partly into it.
What cities are in Contra Costa County?
ZIP codes in Contra Costa County use the city names Alamo, Antioch, Berkeley, Bethel Island, Brentwood, Byron, Canyon, Clayton, Concord, Crockett, Danville and Diablo and others.
What metro area is Contra Costa County in?
Contra Costa County is part of the San Francisco-Oakland-Fremont, CA metropolitan statistical area.