ZIP Code 57620

ZIP code 57620 is classified by USPS as a standard delivery area and covers roughly 1030.0 square miles in Bison, Perkins County, South Dakota. The area is home to 515 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 57620 against South Dakota and the nation.

On the economic side, the median household income for ZIP 57620 sits at $90,500 (18% above the South Dakota average), while per-capita income is $43,062. The poverty rate stands at 6.7% and the unemployment rate at 0.0%. On housing, the median home value is $106,300 (45% below the state average) with median rent at $932 per month, and 79.1% of occupied units are owner-occupied — a direct signal of whether 57620 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 24.0% of adults hold a bachelor's degree or higher, the median age is 43, and the average commute is —. Use the benchmarks above to see where 57620 sits relative to South 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.