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Zip Code 57365 — Oacoma, SD

57365 is a ZIP Code associated with Oacoma, SD, located within Lyman. The postal region supports an estimated population of 599 residents across Data Pending housing units, with a population density of 3.7 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (43.811480, -99.417230)

Data MetricLocal Statistic
Postal / Zip Code57365
Primary CityOacoma
State / ProvinceSD
CountyLyman
Total Population599
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density3.7 people/sq mi
TimezoneAmerica/Chicago

How 57365 Compares

MetricZIP 57365Lyman CountySD State Average
Population5993,704906,188
Median IncomeData PendingN/AN/A
Population Density3.7 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 57325Chamberlain5.6 mi3,335N/A
Zip 57569Reliance8.6 mi497N/A
Zip 57370Pukwana12.2 mi894N/A
Zip 57534Hamill20.6 mi130N/A
Zip 57339Fort Thompson21.0 mi1,390N/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 →