The 2021 Pac-12 Conference men's basketball tournament was a postseason men's basketball tournament for the Pac-12 Conference, which was played March 10âÂÂ13, 2021, at T-Mobile Arena on the Las Vegas Strip in Paradise, Nevada. The winner was Oregon State, which was the first for the Beavers in the history of the tournament. They received the conference's automatic bid to the 2021 NCAA Division I men's basketball tournament. The 2020 Tournament had been cancelled after the first round due to the COVID-19 pandemic. The 2021 tournament was played, but with only family of student-athletes as spectators in attendance.
Eleven of the 12 Pac-12 teams competed in the tournament. The Arizona Wildcats did not compete in the tournament; the university self-imposed a postseason ban for the 2020-21 season due to ongoing NCAA investigations into corruption within the program. Teams were seeded by record within the conference, with tiebreakers in place to seed teams with identical conference records. The top five teams received a bye to the quarterfinals.
^According to the Pac-12, family members were allowed to attend, but the general public was not allowed. As a result, the Pac-12 has not released official attendance numbers.
<onlyinclude> <nowiki>*</nowiki> denotes overtime period</onlyinclude> <nowiki>**</nowiki> denotes double overtime period</onlyinclude>