Union County is in Southern Illinois. Of the 102 counties in the Prairie State, 270,174-acre Union County ranks 71st by size. Recent listings of farms for sale in Illinois's Union County totals roughly 1,000 acres and a combined market value of $1 million. The most common type of land for sale by combined acreage in Union County is recreational property. The average price of farms for sale in Union County was $217,172. Farms for sale in Union 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 business or individual needs.