Piatt County is in Central Illinois. Of the 102 counties in the state, 281,244-acre Piatt County ranks 67th by size. Piatt County, Illinois, has almost 1,000 acres of residential land for sale based on recent Land Network data. The combined market value of farms and rural land for sale here was roughly $7 million. The average price of residential acreage for sale in Piatt County was $442,081. The county has a rural, farm-based economy. Browse all residential land and rural property for sale in Illinois to find residential land and properties that suit your lifestyle needs, from existing residential homes and estates to land ready for future residential-property development.