ZIP Code 98031

ZIP code 98031 is classified by USPS as a standard delivery area and covers roughly 19.4 square miles in Kent, King County, Washington. The area is home to 36,581 residents, producing a population density of 1,882 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 98031 against Washington and the nation.

On the economic side, the median household income for ZIP 98031 sits at $105,965 (17% above the Washington average), while per-capita income is $46,315. The poverty rate stands at 10.4% and the unemployment rate at 6.5%. On housing, the median home value is $611,600 (20% above the state average) with median rent at $1,991 per month, and 67.2% of occupied units are owner-occupied, a direct signal of whether 98031 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 32.1% of adults hold a bachelor's degree or higher, the median age is 38.1, and the average commute is 31 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing King County, so you can benchmark 98031 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 →