A total of approximately 1,000 acres were listed for sale in Clay County recently; the overall value of all Clay County land for sale was nearly $4 million. Clay County ranks 80th in the Sunflower 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, Clay Center featured the most land for sale. Clay County is Kansas's 73rd biggest county (655 square miles). It's located in the Tallgrass Prairie Kansas region of the state.