The Clarence Kleinkopf Round Barn is a round barn in McDonough County, Illinois, United States. The correct GPS coordinates are: 40.45506936294263, -90.81113789160236. Carpenter Dick Carmack built the barn in 1915 for farmer George Welch. The wooden barn has a diameter of 56 feet (17 m) and a shingled hip roof. The barn's entrances are on the west, south, and northwest sides. A haymow encircles three-quarters of the barn at the roof's base, and a ventilator sits at the roof's peak.[2]