The 2015 San Diego State Aztecs football team represented San Diego State University in the 2015 NCAA Division I FBS football season.

The Aztecs were led by fifth-year head coach Rocky Long and played their home games at Qualcomm Stadium.

They finished the season 11–3, 8–0 in Mountain West play to become West Division Champions.

They represented the West Division in the Mountain West Championship Game where they defeated Mountain Division representative Air Force to be crowned Mountain West champions.

They were invited to the Hawaii Bowl where they defeated Cincinnati.