The value of all land and rural real estate for sale in Hamlin County recently was $6 million, representing a total of 36 acres of land for sale in Hamlin County. Hamlin County ranks 24th in the Mount Rushmore State for the combined amount of land currently advertised for sale. Among cities in Hamlin County with farms, ranches, hunting land and other land for sale, Lake Norden had the most land for sale. Hamlin County has a large agricultural economy, with 489 farms recorded in the county during the latest U.S. Census. Farming activities in Hamlin County generate annual revenues of $9 million, most of which is from crops. Hamlin County is South Dakota's 57th largest county (538 square miles). It's located in the Glacial Lakes & Prairies South Dakota region of the state.