2003 Women's National Invitation Tournament

The 2003 Women's National Invitation Tournament was a single-elimination tournament of 32 NCAA Division I teams. These teams were not selected to participate in the 2003 Women's NCAA tournament. It was the sixth edition of the postseason Women's National Invitation Tournament (WNIT).

In the championship game, Auburn defeated the host Baylor by a score of 64–63 to capture their first WNIT title.