📍 View location on OpenStreetMap (37.992140, -121.814200)
| Data Metric | Local Statistic |
|---|---|
| Postal / Zip Code | 94509 |
| Primary City | Antioch |
| State / Province | CA |
| County | Contra Costa |
| Total Population | 70,090 |
| Population Density | 1,551.4 people/sq mi |
| Timezone | America/Los_Angeles |
| Metric | ZIP 94509 | Contra Costa County records | CA records |
|---|---|---|---|
| Population estimate | 70,090 | 1,171,369 (sum) | 39,286,245 (sum) |
| Population Density | 1,551.4 /sq mi | -- | -- |
| County population rank | #2 of 43 | -- | -- |
| State population rank | #60 of 1,762 | -- | -- |
Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.
| ZIP Code | City | Distance | Population estimate |
|---|---|---|---|
| ZIP 94531 | Antioch | 3.2 mi | 46,387 |
| ZIP 94565 | Pittsburg | 6.4 mi | 100,488 |
| ZIP 94561 | Oakley | 6.7 mi | 46,368 |
| ZIP 94517 | Clayton | 7.8 mi | 12,316 |
| ZIP 94513 | Brentwood | 8.4 mi | 69,755 |
Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →