McHenry County is in Northern Illinois. Of the 102 counties in the Prairie State, 391,091-acre McHenry County ranks 36th by size. Recent listings of farms for sale in McHenry County, Illinois, totals almost 1,000 acres and a combined market value of about $28 million. The most common type of land for sale by combined acreage in McHenry County is homesite. The average price of farmland for sale in McHenry County was $1 million. Farms for sale in McHenry 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 business or lifestyle needs.