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Zip Code 57339 — Fort Thompson, SD

57339 is a ZIP Code associated with Fort Thompson, SD, located within Buffalo. The postal region supports an estimated population of 1,390 residents across Data Pending housing units, with a population density of 9.9 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (44.112330, -99.478620)

Data MetricLocal Statistic
Postal / Zip Code57339
Primary CityFort Thompson
State / ProvinceSD
CountyBuffalo
Total Population1,390
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density9.9 people/sq mi
TimezoneAmerica/Chicago

How 57339 Compares

MetricZIP 57339Buffalo CountySD State Average
Population1,3901,469906,188
Median IncomeData PendingN/AN/A
Population Density9.9 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 57548Lower Brule7.5 mi1,442N/A
Zip 57346Stephan9.4 mi13N/A
Zip 57569Reliance18.1 mi497N/A
Zip 57341Gann Valley19.4 mi79N/A
Zip 57325Chamberlain20.6 mi3,335N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →