Land for sale in Clay County, Nebraska, recently totaled $4 million and around 1,000 acres. Clay County ranks 64th in the Cornhusker State for the combined amount of land currently advertised for sale. Sutton had the most land for sale. Its economy is defined as agricultural, with 457 farms recorded in the county during the most recent U.S. Census. Farming activities in Clay County generate annual revenues of $12 million, most of which is from crops. Clay County is the 60th largest county (573 square miles) in Nebraska. It's located in the Southeast Nebraska region of Nebraska.