1990 Big East men's basketball tournament

The 1990 Big East men's basketball tournament took place at Madison Square Garden in New York City, from March 8 to March 11, 1990. Its winner received the Big East Conference's automatic bid to the 1990 NCAA tournament. It is a single-elimination tournament with four rounds. Syracuse and Connecticut tied for the best regular-season conference record. Based on tie-breakers, Syracuse was awarded the #1 seed.

Connecticut defeated Syracuse in the championship game 78–75, to claim its first Big East tournament championship.

Awards
Dave Gavitt Trophy (Most Valuable Player): Chris Smith, Connecticut

All-Tournament Team
 * Derrick Coleman, Syracuse
 * Tate George, Connecticut
 * Tom Greis, Villanova
 * John Gwynn, Connecticut
 * Chris Smith, Connecticut
 * Stephen Thompson, Syracuse