There are 7 zip codes in Yankton County, South Dakota. The most populated is 57078, located in Yankton. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
5707820,266Yankton
570371,008Irene
57031766Gayville
57046702Mission Hill
57072529Volin
57040299Lesterville
57067255Utica

Zip Codes in Yankton County, South Dakota by Population (2024)