|1921 Colorado Agricultural Aggies football|
|Conference||Rocky Mountain Conference|
|1921 record||2–3–1 (2–2–1 RMC)|
|Head coach||Harry W. Hughes (11th season)|
|Home stadium||Colorado Field|
Template:1921 Rocky Mountain Conference football standings The 1921 Colorado Agricultural Aggies football team represented Colorado Agricultural College (now known as Colorado State University) in the Rocky Mountain Conference (RMC) during the 1921 college football season. In their 11th season under head coach Harry W. Hughes, the Aggies compiled a 2–3–1 record (2–2–1 against conference opponents), tied for fourth place in the RMC, and outscored all opponents by a total of 108 to 66.
|October 1||Wyoming||T 7–7|
|October 15||Colorado Mines||W 24–0|
|October 29||at Colorado College||Colorado Springs, CO||W 24–0|
|November 5||Denver||L 14–21|
|November 19||Colorado||L 0–10|
|November 24||at Nebraska*||L 7–70|
- "1921 Colorado State Rams Schedule and Results". SR/College Football. Sports Reference LLC. https://www.sports-reference.com/cfb/schools/colorado-state/1921-schedule.html. Retrieved December 21, 2018.
- "2017 Colorado State Football Media Guide". Colorado State University. 2017. pp. 162, 170. https://s3.amazonaws.com/sidearm.sites/csurams.com/documents/2017/8/21/G145_174_2017FBmg.pdf. Retrieved December 21, 2018.