The 1989 Big East men's basketball tournament took place at Madison Square Garden in New York City, from March 9 to March 12, 1989. Its winner received the Big East Conference's automatic bid to the 1989 NCAA tournament. It is a single-elimination tournament with four rounds. Georgetown had the best regular season conference record and received the #1 seed. Georgetown defeated Syracuse in the championship game 88–79, to claim its sixth Big East tournament championship.

Bracket

First round summary

Quarterfinals summary

Semifinals summary

Championship game summary

Announcers

Awards

Dave Gavitt Trophy (Most Valuable Player): Charles Smith, Georgetown All Tournament Team