John W. Young Round Barn
 The John W. Young Round Barn is an historic structure located near Traer in rural Tama County Iowa United States. It was built in 1917 and has been listed on the National Register of Historic Places since 1986. The building is a true round barn that measures 65 feet (19.8 m) around. The structure is constructed in clay tile and features a two-pitch roof and an 18 foot (5.5 m) central silo that is 45 feet (13.7 m) high.