The University of Illinois Experimental Dairy Farm Historic District, also known as South Farm, is a designated historic district in the U.S. state of Illinois. It is located on the campus of the University of Illinois in Urbana, Illinois. The district consists of eight contributing structures and several non-contributing structures. The district was designated in 1994 when it was added to the National Register of Historic Places as part of the Multiple Property Submission concerning Round Barns in Illinois. Three of the district's buildings are early 20th century round barns constructed between 1908 and 1912. The district covers a total area of 6 acres (2 ha).