The 2019–20 Mount St. Mary's Mountaineers men's basketball team represented Mount St. Mary's University during the 2019–20 NCAA Division I men's basketball season. The Mountaineers were led by second-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 11–21, 7–11 in NEC play to finish in a three-way tie for seventh place. They lost in the quarterfinals of the NEC tournament to Sacred Heart.