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Zip Code 57720 — Buffalo, SD

57720 is a ZIP Code associated with Buffalo, SD, located within Harding. The postal region supports an estimated population of 518 residents across Data Pending housing units, with a population density of 0.2 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (45.549700, -103.606550)

Data MetricLocal Statistic
Postal / Zip Code57720
Primary CityBuffalo
State / ProvinceSD
CountyHarding
Total Population518
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density0.2 people/sq mi
TimezoneAmerica/Denver

How 57720 Compares

MetricZIP 57720Harding CountySD State Average
Population518994906,188
Median IncomeData PendingN/AN/A
Population Density0.2 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 57776Redig21.2 miN/AN/A
Zip 57755Ludlow23.2 mi101N/A
Zip 57724Camp Crook23.4 mi167N/A
Zip 57651Reva26.0 mi191N/A
Zip 57650Ralph34.1 mi17N/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 →