The 2015 Women's Basketball Invitational (WBI) was a single-elimination tournament of 16 National Collegiate Athletic Association (NCAA) Division I teams that did not participate in the 2015 NCAA Women's Division I Basketball Tournament or 2015 Women's National Invitation Tournament. The field of 16 was announced on March 16, 2015. All games were hosted by the higher seed throughout the tournament, unless the higher seed's arena was unavailable. The championship game was hosted by the school with the higher RPI. The tournament was won by the Louisiana–Lafayette Ragin' Cajuns.