ZIP code 94509: Antioch, CA
94509 is a ZIP code in Antioch, California, mainly in Contra Costa County, part of the San Francisco-Oakland-Fremont, CA metro area. About 70,090 people live here.
- Population
- 70,090
- Median household income
- $86,196
- Typical home value
- $536,300-1% in 12 months
- Median rent
- $2,062gross, per month
- Median age
- 38.1
- Homeowners
- 58%of occupied homes
Shaded: ZIP code 94509's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 94509 details
| City | Antioch |
|---|---|
| State | California |
| County | Contra Costa County |
| Metro area | San Francisco-Oakland-Fremont, CA |
| Time zone | Pacific Time (UTC−8), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 17.5 sq mi, plus 0.2 sq mi of water |
| Population density | 4,017 people per sq mi |
| Bachelor's degree or higher | 18.3% of adults 25+ |
| Average commute | 40.5 minutes |
| Center coordinates | 37.99200, -121.81257 |
Median rent in 94509 by bedrooms
| Size | Median gross rent |
|---|---|
| Studio | $1,075/mo |
| 1 bedroom | $1,693/mo |
| 2 bedrooms | $1,993/mo |
| 3 bedrooms | $2,442/mo |
| 4 bedrooms | $2,842/mo |
| 5+ bedrooms | $3,501/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 94509
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 94531 | Antioch, CA | 3.1 mi | 46,387 |
| 94565 | Pittsburg, CA | 6.4 mi | 100,488 |
| 94561 | Oakley, CA | 6.6 mi | 46,368 |
| 94517 | Clayton, CA | 8.2 mi | 12,316 |
| 94513 | Brentwood, CA | 8.3 mi | 69,755 |
| 94527 | Concord, CA | 8.3 mi | — |
| 94548 | Knightsen, CA | 8.9 mi | 832 |
| 94521 | Concord, CA | 9.0 mi | 41,909 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 94509?
A typical home in ZIP code 94509 is worth about $536,300 (Zillow Home Value Index). The median household here earns $86,196 a year. See what buying here would cost per month, with California average taxes and insurance filled in.
Monthly payment for a $536,300 homeWhat can a $86,196 income afford?Rental property numbers
About ZIP code 94509
What city is ZIP code 94509?
ZIP code 94509 is in Antioch, CA, in Contra Costa County.
What county is ZIP code 94509 in?
94509 is mainly in Contra Costa County, California.
What is the population of ZIP code 94509?
About 70,090 people live in ZIP code 94509, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 94509 in?
94509 is in Pacific Time (UTC−8). It observes daylight saving time.
What other ZIP codes does Antioch have?
Antioch, CA also uses 94531.