A total of 5,000 acres were listed for sale in Clay County, Illinois, recently, representing a total value of almost $22 million in Clay County farms, rural land, hunting land and other land for sale. Clay County ranks 92nd in the Land of Lincoln based on the total acres of land for sale of all the counties in the Inland Empire. Among cities in Clay County with farms, rural land, hunting land and other land for sale, Clay City featured the most land for sale. From an economic perspective, manufacturing and related services are the main sectors in Clay County. Clay County is the 60th largest county (469 square miles) in Illinois. It's located in the Southern Illinois region of Illinois.