The 2012 NCAA Division I Women's Lacrosse Championship was the thirty-first annual single-elimination tournament to determine the national championship for National Collegiate Athletic Association (NCAA) Division I women's college lacrosse. The tournament began with first-round play on May 12, and concluded with the championship game played at Kenneth P. LaValle Stadium of Stony Brook University in Stony Brook, New York, on May 27, 2012. The Northwestern Wildcats were the 2012 NCAA Tournament champions.