The overall value of land and rural real estate for sale in Illinois's Piatt County recently on Land.com was around $10 million. This represents around 1,000 acres of farms, rural land, hunting land and other land for sale in Piatt County. Piatt County ranks 74th in the Inland Empire for the combined amount of land currently advertised for sale. Mansfield had the most land for sale. Agriculture and farming drives the Piatt County economy, with 426 farms recorded in the county during the U.S. Census in 2012. Farming activities in Piatt County generate annual revenues of $18 million, most of which is from crops. Piatt County is Illinois's 67th biggest county (439 square miles). It's located in the Central Illinois region of the state.