The 2018–19 Dayton Flyers men's basketball team represented the University of Dayton during the 2018–19 NCAA Division I men's basketball season. The Flyers were led by second-year head coach Anthony Grant and played their home games at the University of Dayton Arena as members of the Atlantic 10 Conference. They finished the season 21-12, 13-5 to finish in 3rd place. As the No. 3 seed in the A-10 Tournament, they lost to Saint Louis in the quarterfinals. They received an at-large bid to the NIT where they lost in the first round to Colorado.