Colorado State University is a public land-grant research university in Fort Collins, Colorado, United States. It is the flagship university of the Colorado State University System. Colorado State University is classified among "R1: Doctoral Universities – Very high research activity". It was founded in 1870 as Colorado Agricultural College and assumed its cu…Colorado State University is a public land-grant research university in Fort Collins, Colorado, United States. It is the flagship university of the Colorado State University System. Colorado State University is classified among "R1: Doctoral Universities – Very high research activity". It was founded in 1870 as Colorado Agricultural College and assumed its current name in 1957.