2021 Big Sky Conference men's basketball tournament

The 2021 Big Sky Conference men's basketball tournament was the postseason tournament for the Big Sky Conference, held March 10–13 at Idaho Central Arena in Boise, Idaho. It was the 46th edition of the tournament, which debuted in 1976.

Seeds
The eleven teams were seeded by conference record, with a tiebreaker system for identical conference records. The top five teams received a first-round bye.