The 2021 ACC men's basketball tournament (officially the 2021 ACC Men's Basketball Tournament Presented by New York Life) was the postseason men's basketball tournament for the Atlantic Coast Conference and held at the Greensboro Coliseum in Greensboro, North Carolina, from March 9 to 13, 2021. It was the 68th annual edition of the tournament. Virginia and Duke elected to withdraw from the tournament due to some of their players testing positive for COVID-19.