The 2017–18 Xavier Musketeers men's basketball team represented Xavier University during the 2017–18 NCAA Division I men's basketball season as a member of the Big East Conference. Led by ninth-year head coach Chris Mack, they played their home games at the Cintas Center in Cincinnati, Ohio. They finished the season 29–6, 15–3 in Big East play to win the Big East championship. In the Big East tournament, they defeated St. John's before losing to Providence in the semifinals. They received an at-large bid to the NCAA tournament as a No. 1 seed in the West region. In the First Round, they defeated Texas Southern before being upset by Florida State in the Second Round.