The 2019–20 Niagara Purple Eagles men's basketball team represented Niagara University in the 2019–20 NCAA Division I men's basketball season.

The Purple Eagles, led by 1st-year head coach Greg Paulus, played their home games at the Gallagher Center in Lewiston, New York as members of the Metro Atlantic Athletic Conference.

[1] On March 11, 2019, head coach Chris Casey was fired.

On March 28, 2019, Niagara hired Patrick Beilein as their new head coach.

[3] On October 24, it was announced that head coach Patrick Beilein would be stepping down from his job, citing personal reasons.