Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Fairfield Township is one of the seventeen townships of Highland County, Ohio, United States. The 2000 census found 3,219 people in the township, 1,683 of whom lived in the unincorporated portions of the township. Two incorporated villages are located in Fairfield Township: Highland in the west, and Leesburg in the center.