The 2019–20 Dayton Flyers men's basketball team represented the University of Dayton during the 2019–20 NCAA Division I men's basketball season.

The Flyers were led by third-year head coach Anthony Grant and played their home games at the University of Dayton Arena as members of the Atlantic 10 Conference.

Grant was named consensus national coach of the year while sophomore Obi Toppin became Dayton's first consensus first-team All-American and earned the majority of major college player of the year awards, including the Naismith College Player of the Year and the John R. Wooden Award.

The season was cut short due to the COVID-19 pandemic prior to the Flyers’ first game of the Atlantic 10 tournament.

They received an at-large bid to the NIT where they lost in the first round to Colorado.