The ACC men's basketball tournament (popularly known as the ACC tournament) is the conference championship tournament in men's basketball for the Atlantic Coast Conference (ACC).

It has been held every year since the ACC's first basketball season concluded in 1954 (with the 2020 tournament only being partially completed due to the COVID-19 pandemic).

The winner, declared conference champion, receives the conference's automatic bid to the NCAA men's tournament.

Since July 1, 1961, the ACC's bylaws have included the phrase "and the winner shall be the conference champion" in referring to the tournament,[1] meaning that the conference tournament winner is the only champion of the ACC.

* Denotes the venue for a future ACC men's basketball tournament.