There was a combined almost $11 million of land and rural real estate for sale in Marshall County recently on Land.com. The total of all Marshall County farms and ranches for sale was 2,000 acres. Marshall County ranks 45th out of 66 counties in South Dakota for the total acreage of land currently advertised for sale. Among cities in Marshall County with farms, ranches, and rural real estate for sale, Langford featured the most land for sale. Agriculture and farming drives the Marshall County economy, with 518 farms recorded in the county during the U.S. Census in 2012. Farming activities in Marshall County generate annual revenues of $10 million, the majority of which comes from livestock products. Marshall County is the 35th largest county (886 square miles) in South Dakota. It's located in the Glacial Lakes & Prairies South Dakota region of South Dakota.