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ZIP Code 94509
Antioch, CA, Contra Costa County
Population
70,090
Land area
17.4sq mi
People per sq mi
4,018
City
Antioch
ZIP 94509 and nearby ZIP codes
ZIP 94509 at a glance
- ZIP 94509 (Antioch) is about 16 times as dense as California as a whole.
- Households here earn a median of $86,196 a year, 13% less than the California figure of $99,122.
- A typical owner-occupied home is valued at $584,100 (20% below California) and median rent is $2,062 a month.
Local data for ZIP 94509
Counts from official public data
Housing and community stats
ZIP 94509, American Community Survey 2020-2024
Median household income
$86,196
Poverty rate
13.4%
Median home value
$584,100
Prices -2.8% in a year
Median rent
$2,062/mo
Homeownership
58.0%
Bachelor's or higher
18.3%
Median age
38.1
Average commute
40.5 min
Economy and federal money
Businesses, pandemic loans and political donations
Business establishments
979
ZIP Business Patterns 2023
Employees
12,352
$756M annual payroll
PPP loans
$94M
1,635 loans
Campaign donations
$70.9K
31% D, 27% R, 2026 cycle
Environment and hazard risk
ZIP 94509, from FEMA, NOAA and EPA
Natural hazard risk
Very High
Top: earthquake
Storm events since 1996
472
Countywide, mostly strong wind
Flood insurance policies
2,681
0.9% of homes, county
July high / Jan low
91° / 40°F
12.6 inches of rain a year
Health statistics
Share of adults in ZIP 94509, CDC PLACES estimates
Obesity
34.2%
U.S. 33.3% +0.9 pts
Diabetes
12.9%
U.S. 12.1% +0.8 pts
Smoking
13.1%
U.S. 12.8% about the same
Uninsured (18-64)
12.9%
U.S. 11.1% +1.8 pts
Frequently asked questions
- What city is ZIP code 94509?
- ZIP code 94509 is in Antioch, CA (Contra Costa County).
- What county is ZIP code 94509 in?
- ZIP code 94509 is mostly in Contra Costa County, California.
- How many people live in ZIP code 94509?
- About 70,090 people live in the 94509 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.
Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.