The 2021 Northeast Conference men's basketball tournament was the postseason men's basketball tournament for the Northeast Conference for the 2020–21 NCAA Division I men's basketball season.
The tournament took place March 6 and 9, 2021 and all tournament games were played on home arenas of the higher-seeded school.
The tournament winner received the automatic bid to the NCAA Tournament.
Due to complications caused by the COVID-19 pandemic, only the top four teams in the Northeast Conference were eligible to compete in the conference tournament.
Teams were seeded by record within the conference, with a tiebreaker system to seed teams with identical conference records.