Postal reference / United States
94521Concord, California
ZIP code 94521 is a United States postal code for Concord, California. Its county association is Contra Costa County. The map reference point is at 37.9575, -121.975.
- State / territory
- California
- Recorded place name
- Concord
- County association
- Contra Costa
- Estimated coordinate
- 37.9575, -121.975
View on OpenStreetMap - ZIP prefix
- 945 · 93 ZIP codes share it
- Data source
- GeoNames postal reference, snapshot September 26, 2026
GeoNames reference data. County associations may not include every intersecting county, place names are postal names rather than legal boundaries, and coordinates are approximate. This is not address validation.
Area
- Land area
- 9.683 sq mi (2023 Census Gazetteer)
Figures are for the ZIP Code Tabulation Area (ZCTA) that most closely matches this ZIP code, not an exact match to USPS delivery boundaries. Source: U.S. Census Bureau, 2023 Gazetteer + 2023 ACS 5-Year Estimates, retrieved 2026-09-27. How to read this data.
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California directoryOther ZIP codes in Concord, CA
Concord has 8 ZIP codes in the reference dataset.
Nearby ZIP code reference points
| ZIP code | Place | State | County association | Miles |
|---|---|---|---|---|
| 94527 | Concord | CA | Contra Costa | 1.0 |
| 94519 | Concord | CA | Contra Costa | 2.7 |
| 94518 | Concord | CA | Contra Costa | 2.8 |
| 94522 | Concord | CA | Contra Costa | 3.4 |
| 94524 | Concord | CA | Contra Costa | 3.4 |
| 94529 | Concord | CA | Contra Costa | 3.4 |
| 94520 | Concord | CA | Contra Costa | 3.7 |
| 94598 | Walnut Creek | CA | Contra Costa | 3.8 |
Straight-line distance between reference points. Nearby points do not prove that ZIP areas touch.
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