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Zip Code 57445 — Groton, SD

57445 is a ZIP Code associated with Groton, SD, located within Brown. The postal region supports an estimated population of 2,072 residents across Data Pending housing units, with a population density of 3.2 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (45.458280, -98.120940)

Data MetricLocal Statistic
Postal / Zip Code57445
Primary CityGroton
State / ProvinceSD
CountyBrown
Total Population2,072
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density3.2 people/sq mi
TimezoneAmerica/Chicago

How 57445 Compares

MetricZIP 57445Brown CountySD State Average
Population2,07237,902906,188
Median IncomeData PendingN/AN/A
Population Density3.2 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 57439Ferney8.6 miN/AN/A
Zip 57427Bath9.7 mi384N/A
Zip 57422Andover10.0 mi174N/A
Zip 57474Stratford14.1 mi237N/A
Zip 57433Columbia16.0 mi318N/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 →