ZIP code 94509
Where is ZIP code 94509?
Antioch, California
Contra Costa County · Standard ZIP code
ZIP code 94509 belongs to Antioch, California in Contra Costa County. 94509 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 70,090 people live in the 94509 area, where the median household income is $86,196. The closest ZIP codes are 94531 (Antioch, 2.6 mi southeast), 94561 (Oakley, 5.7 mi east) and 94565 (Pittsburg, 5.9 mi west).
| ZIP code | 94509 |
|---|---|
| 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 | 37.9939, -121.8089 map |
| 3-digit prefix | 945 |
Population and income in 94509
| Population | 70,090 · higher than 97% of California ZIP codes |
|---|---|
| People per square mile | 4,018 · higher than 70% of California ZIP codes |
| Median age | 38.1 years · lower than 60% of California ZIP codes |
| Men / women | 48% / 52% |
| Median household income | $86,196 · lower than 58% of California ZIP codes |
| Income per person | $37,545 |
| Below the poverty line | 13% |
| Bachelor’s degree or higher | 18% of adults 25+ |
| Median home value | $584,100 · lower than 58% of California ZIP codes |
| Median rent | $2,062 a month |
| Housing units | 24,390 |
| Households | 23,476 (2.97 people on average) |
| Owners / renters | 58% / 42% |
| Land area | 17.45 sq mi (plus 0.23 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 94509. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 94509
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 94531 | Antioch, CA | 2.6 mi SE | Standard |
| 94561 | Oakley, CA | 5.7 mi E | Standard |
| 94565 | Pittsburg, CA | 5.9 mi W | Standard |
| 94517 | Clayton, CA | 7.7 mi SW | Standard |
| 94513 | Brentwood, CA | 7.8 mi SE | Standard |
| 94548 | Knightsen, CA | 8 mi E | PO Box only |
| 94527 | Concord, CA | 8.6 mi W | PO Box only |
| 94511 | Bethel Island, CA | 9.3 mi E | PO Box only |
| 94521 | Concord, CA | 9.4 mi W | Standard |
| 94512 | Birds Landing, CA | 11 mi N | Standard |
| 94519 | Concord, CA | 11.1 mi W | Standard |
| 94522 | Concord, CA | 12.2 mi W | PO Box only |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 94509 or measure the distance to another ZIP code.
How to address mail to 94509
123 MAIN ST
ANTIOCH CA 94509
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (94509-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 94509?
- 94509 is a Antioch, California ZIP code.
- What county is 94509 in?
- ZIP code 94509 is in Contra Costa County, California.
- What time zone is ZIP code 94509 in?
- 94509 is in the Pacific Time zone (America/Los_Angeles).
- What area code is 94509?
- Phone numbers in ZIP code 94509 use area code 925.
- What is the population of ZIP code 94509?
- About 70,090 people live in ZIP code 94509, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 94509?
- The median household income in 94509 is $86,196 a year, lower than 58% of California ZIP codes.
- What ZIP codes are near 94509?
- The nearest ZIP codes to 94509 are 94531 (Antioch, 2.6 miles), 94561 (Oakley, 5.7 miles), 94565 (Pittsburg, 5.9 miles) and 94517 (Clayton, 7.7 miles).