The 2015 Big Ten Women's Lacrosse Tournament was held April 30 to May 3 at High Point Solutions Stadium in Piscataway, New Jersey. The winner of the tournament received the Big Ten Conference's automatic bid to the 2015 NCAA Division I Women's Lacrosse Championship. All six conference teams competed in the inaugural event. The tournament format is single elimination. The seeds were based upon the teams' regular season conference record.