Mercer County is in Western Illinois. Of the 102 counties in the Land of Lincoln, Mercer County ranks 44th in terms of size (568 square miles). The total value of approximately 2,000 acres of farms recently listed for sale in Illinois's Mercer County was almost $7 million. The average price of farms for sale in Mercer County was $808,908. Farms for sale in Mercer County feature 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.