ZIP Code 58640

ZIP code 58640 is classified by USPS as a standard delivery area and covers roughly 1120.0 square miles in Killdeer, Dunn County, North Dakota. The area is home to 1,344 residents, producing a population density of 1 people per square mile, and falls within the Denver time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 58640 against North Dakota and the nation.

On the economic side, the median household income for ZIP 58640 sits at $100,688 (22% above the North Dakota average), while per-capita income is $53,409. The poverty rate stands at 6.6% and the unemployment rate at 1.6%. On housing, the median home value is $343,700 (91% above the state average) with median rent at $869 per month, and 78.6% of occupied units are owner-occupied, a direct signal of whether 58640 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 29.9% of adults hold a bachelor's degree or higher, the median age is 38.6, and the average commute is —. Use the benchmarks above to see where 58640 sits relative to North Dakota 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 →