Saint Clair County is in Southwest Illinois. Of the 102 counties in the Prairie State, 673-square-mile Saint Clair County ranks 29th by size. Illinois's Saint Clair County has almost 1,000 acres of farms for sale based on recent Land Network data. The combined market value of farms, hunting land and other rural land and acreage for sale here was nearly $5 million. The average price of farmland for sale in Saint Clair County was $917,000. Farms for sale in Saint Clair County sustain livestock including horses, cattle, goats, sheep and pig. Browse all Illinois farms for sale on the Land Network to find the farm, cattle operation, hobby farm or other farm property that's right for your future commercial or lifestyle needs.