1899 Colorado Agricultural Aggies football team

The 1899 Colorado Agricultural Aggies football team represented Colorado Agricultural College (now known as Colorado State University) in the Colorado Football Association (CFA) during the 1899 college football season. In their first and only season under head coach W. J. Forbes, the Aggies compiled a 0–2–1 record and were outscored by a total of 117 to 10.

W. J. Forbes was the program's first football coach. He was paid $25 for his services during the 1899 season.