ZIP Code 58631

ZIP code 58631 is classified by USPS as a standard delivery area and covers roughly 958.3 square miles in Glen Ullin, Morton County, North Dakota. The area is home to 1,150 residents, producing a population density of 1 people per square mile, and falls within the North Dakota/New Salem time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 58631 against North Dakota and the nation.

On the economic side, the median household income for ZIP 58631 sits at $58,036 (30% below the North Dakota average), while per-capita income is $39,920. The poverty rate stands at 6.5% and the unemployment rate at 3.1%. On housing, the median home value is $133,100 (26% below the state average) with median rent at $775 per month, and 84.3% of occupied units are owner-occupied, a direct signal of whether 58631 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 20.5% of adults hold a bachelor's degree or higher, the median age is 52.8, and the average commute is 31 minutes. Use the benchmarks above to see where 58631 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 →