The 2008–09 NCAA Division I men's ice hockey season began on October 10, 2008 and concluded with the 2009 NCAA Division I men's ice hockey tournament's championship game on April 11, 2009 at the Verizon Center in Washington, D.C. Over the course of the season, five teams achieved the nation's #1 ranking, with Boston University finishing the season as the top-ranked team after winning the national championship tournament. This was the 62nd season in which an NCAA ice hockey championship was held and is the 115th year overall where an NCAA school fielded a team.