Land for sale in Clay County, Arkansas, recently totaled almost $41 million and around 5,000 acres. Clay County ranks 45th in the Wonder State for the combined amount of land currently advertised for sale. Of all locations in Clay County with land and rural real estate for sale, Corning featured the most land for sale. Clay County has a large agricultural economy, with 610 farms recorded in the county during the latest U.S. Census. Farming activities in Clay County generate annual revenues of $3 million, most of which is from crops. Clay County is the 42nd largest county (641 square miles) in Arkansas. It's located in the Delta Arkansas region of the state.