Mercer County is in Western Illinois. Of the 102 counties in the Prairie State, Mercer County ranks 44th in terms of size (363,963 acres). There is roughly 1,000 acres of farms for sale in Illinois's Mercer County based on recent Land Network data. The combined market value of land and rural real estate for sale here is roughly $6 million. The average price of farmland for sale in Mercer County was $2 million. Farms for sale in Mercer County hold 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 individual needs.