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Zip Code 57661 — Whitehorse, SD

ZIP Code 57661 is associated with Whitehorse, SD, in Dewey County. The listed population estimate is 177; estimated density is 2.4 people per square mile. Among records with population estimates, it ranks #5 of 7 in Dewey County and #315 of 372 in SD.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (45.270050, -100.964330)

Data MetricLocal Statistic
Postal / Zip Code57661
Primary CityWhitehorse
State / ProvinceSD
CountyDewey
Total Population177
Population Density2.4 people/sq mi
TimezoneAmerica/Denver

How 57661 Compares

MetricZIP 57661Dewey County recordsSD records
Population estimate1778,754 (sum)906,188 (sum)
Population Density2.4 /sq mi----
County population rank#5 of 7----
State population rank#315 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 57630Glencross7.4 mi11
ZIP 57656Timber Lake12.7 mi1,000
ZIP 57652Ridgeview16.2 mi265
ZIP 57657Trail City19.3 mi247
ZIP 57625Eagle Butte21.7 mi3,775

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 →