Home > SD > Spink County > Frankfort > Zip 57440

Zip Code 57440 — Frankfort, SD

57440 is a ZIP Code associated with Frankfort, SD, located within Spink. The postal region supports an estimated population of 466 residents across Data Pending housing units, with a population density of 1.3 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (44.850200, -98.259560)

Data MetricLocal Statistic
Postal / Zip Code57440
Primary CityFrankfort
State / ProvinceSD
CountySpink
Total Population466
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density1.3 people/sq mi
TimezoneAmerica/Chicago

How 57440 Compares

MetricZIP 57440Spink CountySD State Average
Population4666,010906,188
Median IncomeData PendingN/AN/A
Population Density1.3 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 57436Doland8.2 mi440N/A
Zip 57477Turton13.8 mi117N/A
Zip 57469Redfield15.5 mi2,866N/A
Zip 57258Raymond16.6 mi510N/A
Zip 57348Hitchcock16.6 mi776N/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 →