ZIP code 94531
Where is ZIP code 94531?
Antioch, California
Contra Costa County · Standard ZIP code
ZIP code 94531 belongs to Antioch, California in Contra Costa County. 94531 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Pacific Time zone and uses area code 925. About 46,387 people live in the 94531 area, where the median household income is $120,927. The closest ZIP codes are 94509 (Antioch, 2.6 mi northwest), 94561 (Oakley, 4.4 mi northeast) and 94513 (Brentwood, 5.2 mi southeast).
| ZIP code | 94531 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Antioch |
| State | California (CA) |
| County | Contra Costa County |
| Time zone | Pacific Time · now |
| Area code | 925 |
| Coordinates | 37.9658, -121.7758 map |
| 3-digit prefix | 945 |
Population and income in 94531
| Population | 46,387 · higher than 84% of California ZIP codes |
|---|---|
| People per square mile | 3,307 · higher than 66% of California ZIP codes |
| Median age | 38.8 years · lower than 57% of California ZIP codes |
| Men / women | 48% / 52% |
| Median household income | $120,927 · higher than 73% of California ZIP codes |
| Income per person | $46,240 |
| Below the poverty line | 8.3% |
| Bachelor’s degree or higher | 32% of adults 25+ |
| Median home value | $701,600 · higher than 54% of California ZIP codes |
| Median rent | $3,150 a month |
| Housing units | 14,239 |
| Households | 13,905 (3.3 people on average) |
| Owners / renters | 73% / 27% |
| Land area | 14.03 sq mi |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 94531. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 94531
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 94509 | Antioch, CA | 2.6 mi NW | Standard |
| 94561 | Oakley, CA | 4.4 mi NE | Standard |
| 94513 | Brentwood, CA | 5.2 mi SE | Standard |
| 94548 | Knightsen, CA | 6 mi E | PO Box only |
| 94517 | Clayton, CA | 8.1 mi SW | Standard |
| 94565 | Pittsburg, CA | 8.1 mi W | Standard |
| 94511 | Bethel Island, CA | 8.4 mi NE | PO Box only |
| 94527 | Concord, CA | 10 mi W | PO Box only |
| 94505 | Discovery Bay, CA | 10.4 mi SE | Standard |
| 94521 | Concord, CA | 10.9 mi W | Standard |
| 94506 | Danville, CA | 12 mi SW | Standard |
| 94514 | Byron, CA | 12.8 mi SE | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 94531 or measure the distance to another ZIP code.
How to address mail to 94531
123 MAIN ST
ANTIOCH CA 94531
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (94531-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Antioch, CA
All Antioch ZIP codes with population and income →
Questions
- What city is ZIP code 94531?
- 94531 is a Antioch, California ZIP code.
- What county is 94531 in?
- ZIP code 94531 is in Contra Costa County, California.
- What time zone is ZIP code 94531 in?
- 94531 is in the Pacific Time zone (America/Los_Angeles).
- What area code is 94531?
- Phone numbers in ZIP code 94531 use area code 925.
- What is the population of ZIP code 94531?
- About 46,387 people live in ZIP code 94531, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 94531?
- The median household income in 94531 is $120,927 a year, higher than 73% of California ZIP codes.
- What ZIP codes are near 94531?
- The nearest ZIP codes to 94531 are 94509 (Antioch, 2.6 miles), 94561 (Oakley, 4.4 miles), 94513 (Brentwood, 5.2 miles) and 94548 (Knightsen, 6 miles).