Dammon Round Barn is a round barn just southeast of Red Wing, Minnesota, United States, adjacent to U.S. Route 61. The barn is listed on the National Register of Historic Places. It was built in 1914, with a foundation of Mississippi River limestone, and is 60 feet (18 m) in diameter and 60 feet (18 m) high. It was built during a time of agricultural growth in Goodhue County, when dairy cow herds were averaging 25 cows per farm and farmers were starting to build specialized barns.