The 2002–03 Wisconsin Badgers men's basketball team represented University of Wisconsin–Madison as a member of the Big Ten Conference during the 2002–03 NCAA Division I men's basketball season. The head coach was Bo Ryan, coaching his second season with the Badgers. The team played its home games at the Kohl Center in Madison, Wisconsin. Wisconsin finished 24-8, 12-4 in Big Ten play to finish as outright regular season champions for the first time since 1947.