ZIP Code 99140

ZIP code 99140 is classified by USPS as a standard delivery area and covers roughly 950.0 square miles in Keller, Ferry County, Washington. The area is home to 475 residents, producing a population density of 1 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 99140 against Washington and the nation.

On the economic side, the median household income for ZIP 99140 sits at $53,529 (41% below the Washington average), while per-capita income is $26,752. The poverty rate stands at 21.2% and the unemployment rate at 7.0%. On housing, the median home value is $140,700 (72% below the state average) with median rent at $450 per month, and 79.2% of occupied units are owner-occupied, a direct signal of whether 99140 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 12.3% of adults hold a bachelor's degree or higher, the median age is 51.5, and the average commute is —. Use the benchmarks above to see where 99140 sits relative to Washington and the national baseline rather than viewing the numbers in isolation. 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 →