Hamlin County is in Glacial Lakes & Prairies South Dakota. Of the 66 counties in the Coyote State, Hamlin County is 57th in terms of its size (344,365 acres). The most common type of land for sale by combined acreage in Hamlin County is lakefront property. Browse all Hamlin County undeveloped land for sale on the Land Network to find your next commercial property or land investment.