Codington County is in Glacial Lakes & Prairies South Dakota. Of the 66 counties in the Mount Rushmore State, 717-square-mile Codington County ranks 46th by size. The most common type of land for sale by combined acreage in Codington County is homesite. Browse all residential property and land for sale in Codington County to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.