| Year: | 1991 |
| Team: | Appalachian State Mountaineers |
| Sport: | football |
| Conference: | Southern Conference |
| Short Conf: | SoCon |
| Record: | 8–4 |
| Conf Record: | 5–1 |
| Head Coach: | Jerry Moore |
| Hc Year: | 3rd |
| Stadium: | Kidd Brewer Stadium |
| Champion: | SoCon champion |
| Bowl: | NCAA Division I-AA First Round |
| Bowl Result: | L 3–14 vs. Eastern Kentucky |
The 1991 Appalachian State Mountaineers football team was an American football team that represented Appalachian State University as a member of the Southern Conference (SoCon) during the 1991 NCAA Division I-AA football season. In their third year under head coach Jerry Moore, the Mountaineers compiled an overall record of 8–4 with a conference mark of 5–1. Appalachian State was SoCon champion and advanced to the NCAA Division I-AA Football Championship playoffs, where they lost to Eastern Kentucky in the first round.
The following Mountaineers were selected in the 1992 NFL draft following the season.[1]
| 5 | 122 | Gary Dandridge | Defensive back | Seattle Seahawks | |
| 7 | 178 | Mike Frier | Defensive tackle | Seattle Seahawks |