ZIP Code 94931

ZIP code 94931 is classified by USPS as a standard delivery area and covers roughly 16.5 square miles in Cotati, Sonoma County, California. The area is home to 8,470 residents, producing a population density of 515 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 94931 against California and the nation.

On the economic side, the median household income for ZIP 94931 sits at $101,994 (0% above the California average), while per-capita income is $55,275. The poverty rate stands at 8.6% and the unemployment rate at 3.4%. On housing, the median home value is $820,000 (6% above the state average) with median rent at $1,913 per month, and 59.2% of occupied units are owner-occupied, a direct signal of whether 94931 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 36.1% of adults hold a bachelor's degree or higher, the median age is 39.2, and the average commute is 28 minutes. We also surface 9 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Sonoma County, so you can benchmark 94931 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 →