List of ZIP Codes in Contra Costa County
The following table lists ZIP Codes associated with Contra Costa County, California, based on ZIP Code Tabulation Area (ZCTA) data from the U.S. Census Bureau.
| S.N. | Zip Code | Latitude | Longitude | City | Population | Density |
|---|---|---|---|---|---|---|
| 1 | 94505 | 37.86638 | -121.5868 | Discovery Bay | 15,316 | 354.7 |
| 2 | 94506 | 37.80862 | -121.90498 | Danville | 27,261 | 564.2 |
| 3 | 94507 | 37.85429 | -122.00664 | Alamo | 14,546 | 501.5 |
| 4 | 94509 | 37.99214 | -121.8142 | Antioch | 71,013 | 1571.8 |
| 5 | 94511 | 38.02883 | -121.64039 | Bethel Island | 2,144 | 157.6 |
| 6 | 94513 | 37.92541 | -121.68452 | Brentwood | 68,160 | 333.7 |
| 7 | 94514 | 37.83071 | -121.63392 | Byron | 2,044 | 26.3 |
| 8 | 94516 | 37.82748 | -122.16629 | Canyon | 208 | 22.2 |
| 9 | 94517 | 37.8926 | -121.88252 | Clayton | 12,164 | 98.4 |
| 10 | 94518 | 37.95052 | -122.02209 | Concord | 27,743 | 1933.2 |
| 11 | 94519 | 37.98881 | -122.01275 | Concord | 19,918 | 1695.4 |
| 12 | 94520 | 37.99344 | -122.03532 | Concord | 36,767 | 1438.0 |
| 13 | 94521 | 37.95293 | -121.96971 | Concord | 41,118 | 1639.6 |
| 14 | 94523 | 37.95403 | -122.07608 | Pleasant Hill | 34,789 | 1864.1 |
| 15 | 94525 | 38.04811 | -122.2292 | Crockett | 3,665 | 577.0 |
| 16 | 94526 | 37.81472 | -121.98451 | Danville | 33,085 | 969.9 |
| 17 | 94528 | 37.84149 | -121.95819 | Diablo | 1,000 | 334.6 |
| 18 | 94530 | 37.92076 | -122.30068 | El Cerrito | 26,229 | 2338.6 |
| 19 | 94531 | 37.95665 | -121.77777 | Antioch | 44,746 | 1231.6 |
| 20 | 94547 | 38.00637 | -122.26117 | Hercules | 26,245 | 1787.1 |
| 21 | 94548 | 37.97481 | -121.65265 | Knightsen | 637 | 106.4 |
| 22 | 94549 | 37.90133 | -122.11933 | Lafayette | 28,247 | 549.6 |
| 23 | 94553 | 37.97999 | -122.15368 | Martinez | 48,600 | 304.4 |
| 24 | 94556 | 37.83102 | -122.10425 | Moraga | 15,922 | 318.9 |
| 25 | 94561 | 37.99311 | -121.69172 | Oakley | 45,386 | 1010.6 |
| 26 | 94563 | 37.88196 | -122.19419 | Orinda | 19,409 | 365.1 |
| 27 | 94564 | 37.98896 | -122.27018 | Pinole | 18,835 | 1064.8 |
| 28 | 94565 | 38.00926 | -121.92886 | Pittsburg | 99,933 | 851.9 |
| 29 | 94569 | 38.04411 | -122.19201 | Port Costa | 194 | 58.3 |
| 30 | 94572 | 38.02392 | -122.23285 | Rodeo | 8,712 | 366.0 |
| 31 | 94575 | 37.84235 | -122.11012 | Moraga | 1,005 | 2410.6 |
| 32 | 94582 | 37.76357 | -121.91469 | San Ramon | 47,182 | 1358.3 |
| 33 | 94583 | 37.77245 | -121.99157 | San Ramon | 39,418 | 716.7 |
| 34 | 94595 | 37.87206 | -122.06892 | Walnut Creek | 17,051 | 1261.6 |
| 35 | 94596 | 37.88902 | -122.03676 | Walnut Creek | 23,592 | 1502.5 |
| 36 | 94597 | 37.91768 | -122.0718 | Walnut Creek | 24,235 | 2308.8 |
| 37 | 94598 | 37.89238 | -121.98283 | Walnut Creek | 26,293 | 492.5 |
| 38 | 94708 | 37.90276 | -122.26202 | Berkeley | 11,967 | 1387.5 |
| 39 | 94801 | 37.95217 | -122.38025 | Richmond | 33,564 | 1124.1 |
| 40 | 94803 | 37.95683 | -122.28235 | El Sobrante | 27,588 | 830.9 |
| 41 | 94804 | 37.92074 | -122.34204 | Richmond | 44,679 | 2661.9 |
| 42 | 94805 | 37.94215 | -122.32364 | Richmond | 15,356 | 3178.6 |
| 43 | 94806 | 37.97811 | -122.33618 | San Pablo | 61,749 | 3036.4 |
About Contra Costa County ZIP Codes
Contra Costa County in California (CA) is served by approximately 43 ZIP Codes. These codes cover residential neighborhoods, business districts, and rural areas that fall under the county's jurisdiction.
Based on ZIP-level population estimates, the total population covered by these ZIP Codes is around 1,167,715 people. Population and density values vary from one ZIP Code to another, reflecting the mix of dense urban communities and lower-density suburban or rural zones.
Many of the most significant population centers in Contra Costa County are located in cities such as Concord, Antioch, Pittsburg, Richmond, Walnut Creek. These cities and towns help define the economic and demographic character of the county.
Most ZIP Codes in Contra Costa County, California follow the America/Los_Angeles time zone.
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