The 2018–19 Mount St. Mary's Mountaineers men's basketball team represented Mount St. Mary's University during the 2018–19 NCAA Division I men's basketball season. The Mountaineers were led by first-year head coach Dan Engelstad, and played their home games at Knott Arena in Emmitsburg, Maryland as members of the Northeast Conference. They finished the season 9–22 overall, 6–12 in NEC play to finish in ninth place. They failed to qualify for the NEC tournament.