1999 Colorado State Rams football team

The 1999 Colorado State Rams football team represented Colorado State University in the 1999 NCAA Division I-A football season. The team was led by seventh-year head coach Sonny Lubick and played its home games at Hughes Stadium. They finished the regular season with an 8–3 record overall and a 5–2 record in the newly formed Mountain West Conference, making them conference co-champions. The team was selected to play in the Liberty Bowl, in which they lost to Southern Miss.