Land for sale in Marion County recently totaled nearly $4 million and almost 1,000 acres. Marion County ranks 61st in the Sunflower State for the total number of acres of land currently advertised for sale. Of all locations in Marion County with land and rural real estate for sale, Marion featured the most land for sale. Agriculture and farming drives the Marion County economy, with 981 farms recorded in the county during the U.S. Census in 2012. Farming activities in Marion County generate annual revenues of $15 million, most of which is from crops. Marion County is the 20th largest county (953 square miles) in Kansas. It's located in the Tallgrass Prairie Kansas region of Kansas.