A combined 3,000 acres were listed for sale in South Dakota's Marshall County recently; the value of all Marshall County land and rural real estate for sale was nearly $10 million. Marshall County ranks 41st in the Mount Rushmore State for the combined amount of land currently advertised for sale. Among cities in Marshall County with land and rural real estate for sale, Langford had the most land for sale. Its economy is defined as agricultural, with 518 farms recorded in the county during the most recent U.S. Census. Farming activities in Marshall County generate annual revenues of $10 million, the majority of which comes from livestock products. Marshall County is South Dakota's 35th largest county (886 square miles). It's located in the Glacial Lakes & Prairies South Dakota region of South Dakota.