The 2025 Appalachian State Mountaineers football team represented Appalachian State University in the Sun Belt Conference's East Division during the 2025 NCAA Division I FBS football season. The Mountaineers were led by Dowell Loggains in his first year as the head coach. The Mountaineers played home games at the Kidd Brewer Stadium, located in Boone, North Carolina.
The Appalachian State Mountaineers drew an average home attendance of 31,813, the 71st-highest of all college football teams.
In the Sun Belt preseason coaches' poll, the Mountaineers were picked to finish third place in the East division.
Wide receiver Dalton Stroman was selected as a member of the preseason All-Sun Belt second team offense.