The 2008 Women's National Invitation Tournament (WNIT) was a single-elimination tournament of 48 National Collegiate Athletic Association (NCAA) Division I teams that did not participate in the 2008 NCAA Women's Division I Basketball Tournament. The 40th annual tournament was played from March 19, 2008 to April 5, 2008, entirely on campus sites. The highest ranked team in each conference that did not receive a bid to the NCAA Tournament received an automatic bid to this tournament. The remaining slots were filled by the WNIT Selection Committee. Marquette defeated Michigan State 81–66 to win the tournament.