The 2015 Montana State Bobcats football team represented Montana State University as a member of the Big Sky Conference during the 2015 NCAA Division I FCS football season.
Led by Rob Ash in his ninth and final season as head coach, Montana State compiled an overall record of 5–6 with a mark of 3–5 in conference play, placing in a three-way tie for eighth place in the Big Sky.
The Bobcats played their home games at Bobcat Stadium in Bozeman, Montana.
[1] He finished his tenure as Montana State with a nine-year record of 70–38.
The game with Eastern Washington on September 19 was not counted as a conference game even though Eastern Washington was also a member of the Big Sky Conference.