County of McHenry Company

Located in northeastern Illinois on the Illinois/Wisconsin border, McHenry County lies in the center of Chicago, Rockford, and Milwaukee. Founded in 1836, McHenry County consists of 611 square miles of land and 7.64 square miles of water. Recognized for its scenic beauty and outstanding recreational opportunities, McHenry County has 25,371 acres of conservation land with 17 dedicated state nature preserves, along with 33 sites open to the public offering exceptional opportunities to explore the scenery and view wildlife in its natural habitat.