| Year: | 1966 |
| Team: | Appalachian State Mountaineers |
| Sport: | football |
| Conference: | Carolinas Conference |
| Short Conf: | Carolinas |
| Record: | 3–6–1 |
| Conf Record: | 2–5 |
| Head Coach: | Carl Messere |
| Hc Year: | 2nd |
| Stadium: | Conrad Stadium |
The 1966 Appalachian State Mountaineers football team was an American football team that represented Appalachian State Teachers College (now known as Appalachian State University) as a member of the Carolinas Conference during the 1966 NAIA football season. In their second year under head coach Carl Messere, the Mountaineers compiled an overall record of 3–6–1, with a mark of 2–5 in conference play, and finished seventh in the Carolinas Conference.[1]