Clarence Kleinkopf Round Barn

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 ft 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.

The barn was added to the National Register of Historic Places in 1982. It is one of the original round barns submitted to the Register as part of the Round Barns in Illinois Multiple Property Submission.

Two other barns built by Carmack within 2 miles no longer survive.