Find the last 4 digits (ZIP+4) for an address in 57440

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ZIP Code 57440 – Frankfort, SD

Frankfort, South Dakota · Spink County · Central time

ZIP code57440
CityFrankfort
StateSouth Dakota
CountySpink County
Area code605
Population466
Time zoneCentral · local time
ZIP typeStandard (has a Census ZCTA area)
Land area141.93 sq mi
Center (lat, long)44.8534, -98.2567

Map

Nearby ZIP codes

57436 Doland · 8.9 mi57477 Turton · 13.6 mi57469 Redfield · 15.4 mi57258 Raymond · 16.2 mi57348 Hitchcock · 16.7 mi57424 Ashton · 17.4 mi57476 Tulare · 20.3 mi57322 Carpenter · 20.7 mi

About ZIP 57440

ZIP code 57440 is assigned to Frankfort, South Dakota. It lies in Spink County. Its Census area covers about 141.93 square miles of land. The closest neighboring ZIP is 57436 (Doland), about 8.9 miles away.

Every address in 57440 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources