Bob Nielson (born September 28, 1959) is an American football coach. He is the head football coach at the University of South Dakota, a position he had held since the 2016 season. Nielson was the head football coach at Ripon College (1989–1990), Wartburg College (1991–1995), the University of Wisconsin–Eau Claire (1996–1998), University of Minnesota–Duluth (1999–2003, 2008–2012), and Western Illinois University (2013–2015). His Minnesota–Duluth Bulldogs won the NCAA Division II Football Championship in 2008 and 2010.