ZIP Code 57439

ZIP code 57439 is classified by USPS as a standard delivery area and covers roughly 13.0 square miles in Ferney, Brown County, South Dakota. The area is home to 52 residents, producing a population density of 4 people per square mile, and falls within the Chicago time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 57439 against South Dakota and the nation.

On the economic side, the median household income for ZIP 57439 sits at —, while per-capita income is —. The poverty rate stands at — and the unemployment rate at —. On housing, the median home value is — with median rent at — per month, and — of occupied units are owner-occupied — a direct signal of whether 57439 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: — of adults hold a bachelor's degree or higher, the median age is —, and the average commute is —. We also surface 1 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Brown County, so you can benchmark 57439 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 →