The 1990 Atlantic 10 men's basketball tournament was held as the conclusion to the 1989-90 Atlantic 10 Conference collegiate men's basketball season.
[1] Finals were held on March 8, 1990, at McGonigle Hall in Philadelphia, in which the Temple Owls beat the Massachusetts Minutemen by a two point margin to win the Tournament on home ground.
[1] Temple was the only team to receive an automatic bid to the 1990 NCAA Men's Division I Basketball Tournament.
The top six teams in the conference received first-round byes.
[1] The Atlantic 10 Conference tournament finals have only ever been won by a margin of two points one other time, when the Saint Louis Billikens beat the St. Bonaventure Bonnies in 2019.