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Zip Code 57650 — Ralph, SD

ZIP Code 57650 is associated with Ralph, SD, in Harding County. The listed population estimate is 17; estimated density is 0.1 people per square mile. Among records with population estimates, it ranks #5 of 5 in Harding County and #367 of 372 in SD.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (45.834600, -103.030330)

Data MetricLocal Statistic
Postal / Zip Code57650
Primary CityRalph
State / ProvinceSD
CountyHarding
Total Population17
Population Density0.1 people/sq mi
TimezoneAmerica/Denver

How 57650 Compares

MetricZIP 57650Harding County recordsSD records
Population estimate17994 (sum)906,188 (sum)
Population Density0.1 /sq mi----
County population rank#5 of 5----
State population rank#367 of 372----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in SD

ZIP CodeCityDistancePopulation estimate
ZIP 57755Ludlow15.8 mi101
ZIP 57640Lodgepole16.4 mi41
ZIP 57651Reva24.3 mi191
ZIP 57649Prairie City25.2 mi273
ZIP 57720Buffalo34.1 mi518

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 →