ZIP Code 94509

ZIP code 94509 is classified by USPS as a standard delivery area and covers roughly 42.4 square miles in Antioch, Contra Costa County, California. The area is home to 62,439 residents, producing a population density of 1,472 people per square mile, and falls within the Los Angeles time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 94509 against California and the nation.

On the economic side, the median household income for ZIP 94509 sits at $86,196 (15% below the California average), while per-capita income is $37,545. The poverty rate stands at 13.4% and the unemployment rate at 7.5%. On housing, the median home value is $584,100 (24% below the state average) with median rent at $2,062 per month, and 58.0% of occupied units are owner-occupied, a direct signal of whether 94509 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 18.3% of adults hold a bachelor's degree or higher, the median age is 38.1, and the average commute is 41 minutes. We also surface 7 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Contra Costa County, so you can benchmark 94509 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →