Home > SD > Harding County > Ralph > Zip 57650

Zip Code 57650 — Ralph, SD

57650 is a ZIP Code associated with Ralph, SD, located within Harding. The postal region supports an estimated population of 17 residents across Data Pending housing units, with a population density of 0.1 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (45.834600, -103.030330)

Data MetricLocal Statistic
Postal / Zip Code57650
Primary CityRalph
State / ProvinceSD
CountyHarding
Total Population17
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density0.1 people/sq mi
TimezoneAmerica/Denver

How 57650 Compares

MetricZIP 57650Harding CountySD State Average
Population17994906,188
Median IncomeData PendingN/AN/A
Population Density0.1 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 57755Ludlow15.8 mi101N/A
Zip 57640Lodgepole16.4 mi41N/A
Zip 57651Reva24.3 mi191N/A
Zip 57649Prairie City25.2 mi273N/A
Zip 57720Buffalo34.1 mi518N/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 →