| Year: | 1991 |
| Team: | Montana State Bobcats |
| Sport: | football |
| Conference: | Big Sky Conference |
| Short Conf: | Big Sky |
| Record: | 2–9 |
| Conf Record: | 1–7 |
| Head Coach: | Earle Solomonson |
| Hc Year: | 5th |
| Stadium: | Sales Stadium |
The 1991 Montana State Bobcats football team was an American football team that represented Montana State University in the Big Sky Conference during the 1991 NCAA Division I-AA football season. In their fifth and final season under head coach Earle Solomonson, the Bobcats compiled a 2–9 record (1–7 against Big Sky opponents) and finished in a tie for last place in the Big Sky.[1]