The 2019–20 Siena Saints men's basketball team represented Siena College in the 2019–20 NCAA Division I men's basketball season. The Saints, led by first-year head coach Carmen Maciariello, played their home games at the Times Union Center in Albany, New York as members of the Metro Atlantic Athletic Conference. They finished the season 20–10 overall, 15–5 in MAAC play to finish in first place. As the #1 seed in the MAAC tournament, they defeated #9 seed Manhattan 63–49 in the quarterfinals. However, the semifinals and championship game, and all postseason tournaments, were cancelled amid the COVID-19 pandemic.