The 2020 ACC men's basketball tournament presented by New York Life was the postseason men's basketball tournament for the Atlantic Coast Conference and was held at the Greensboro Coliseum in Greensboro, North Carolina, from March 10 to 11, 2020.

Due to ongoing concerns with the COVID-19 pandemic, officials announced that, initially, the tournament would only be played in front of essential tournament personnel, limited school administrators and student-athlete guests, broadcast television, and credentialed media members present, starting with the quarterfinals; however, shortly before the tipoff of the quarterfinal matchup between Florida State and Clemson, the ACC announced the tournament was canceled and Florida State, the regular season champions, would receive the conference's automatic bid to the NCAA tournament, though that decision became moot with the NCAA Tournament's cancellation later the same day.

[2][3] Florida State was awarded the conference championship along with the trophy for the 2020 tournament.

Fourteen of the 15 ACC teams would have participated in the tournament; the other team, Georgia Tech, was banned from postseason play, including the conference tournament, due to NCAA rules violations.

[6] Ultimately, the tournament being canceled shortly before the quarterfinal games were to have begun resulted in the top four seeds not playing at all.