The 2015 BYU Cougars women's volleyball team represented Brigham Young University in the 2015 NCAA Division I women's volleyball season. The Cougars were led by first year head coach Heather Olmstead and played their home games at the Smith Fieldhouse. The Cougars were members of the WCC. BYU came off a season where they won the WCC regular season championship, participated in the NCAA tournament, and became the first unseeded team to make it to the National Championship match.