2003 National Invitation Tournament

The 2003 National Invitation Tournament was the 2003 edition of the annual NCAA college basketball competition. St. John's tournament victory was later vacated due to use of an ineligible player. Marcus Hatten's tournament Most Valuable Player award was also vacated. This would be the last NIT in which a third-place game would be played until 2021.

Selected teams
Below is a list of the 40 teams selected for the tournament.

Bracket
Below are the four first round brackets, along with the four-team championship bracket.

Semifinals & finals
St. John's later vacated the title due to an ineligible player.