The 2018 Sun Belt Conference Championship Game was played on December 1, 2018, between the Mountaineers of Appalachian State and the Ragin' Cajuns from Louisiana. The game was played at Kidd Brewer Stadium in Boone, North Carolina, due to Appalachian State's better conference record. This was the second time these teams played this year; the first meeting finished 27–17 in the Mountaineers' favor. The winner of the game would play in the R+L Carriers New Orleans Bowl while the loser would play in the Cure Bowl.

The Appalachian State Mountaineers football team is the intercollegiate American football team representing Appalachian State University in Boone, North Carolina. The Mountaineers have competed in the Football Bowl Subdivision (FBS) and the Sun Belt Conference since 2014. Appalachian plays its home games in Kidd Brewer Stadium, named after former head coach Kidd Brewer, whose 1937 squad was unbeaten and unscored upon during the regular season, outscoring opponents 206–0.