The 2023–24 SMU Mustangs men's basketball team represented Southern Methodist University during the 2023–24 NCAA Division I men's basketball season. The Mustangs were led by second-year head coach Rob Lanier and played their home games at Moody Coliseum on their campus in University Park, Texas as members of the American Athletic Conference. They finished the season 20–13, 11–7 in AAC play to finish in a tie for fifth place. As the No. 6 seed in the AAC tournament, they lost to Temple in the second round.