The Niels Nielsen Fourteen-Side Barn Farm near Noonan, North Dakota, United States, is a round barn that was built in 1914 by successful Danish immigrant Niels Nielsen. It was built from a kit purchased from the . It was listed on the National Register of Historic Places in 1986. The barn "is an important representative of the round barn theme because it illustrates the popularity of pre-cut kits sometimes used in theirconstruction."