2008–09 Xavier Musketeers men's basketball team

They were led by head coach Sean Miller in his fifth and final season at Xavier.

The Musketeers were members of the Atlantic 10 Conference and played their home games at the Cintas Center.

The Musketeers defeated Portland State and Wisconsin to advance to the Sweet Sixteen before losing to Pittsburgh.

Xavier lost to Saint Joseph's in the semifinals of the A-10 tournament.

The Musketeers received an at-large bid as a #3 seed to the NCAA tournament where they advanced to the Elite Eight before losing to UCLA.