The 2015 Colorado State Rams football team represented Colorado State University during the 2015 NCAA Division I FBS football season.

The Rams were led by first-year head coach Mike Bobo and played their home games at Sonny Lubick Field at Hughes Stadium.

They were invited to inaugural Arizona Bowl where they lost to fellow Mountain West member Nevada.

[1] The Rams and Wolf Pack are both members of the Mountain West Conference.

However, they are in opposite divisions and did not play each other in the regular season in 2015.