1999 Big Ten men's basketball tournament

The 1999 Big Ten men's basketball tournament was the second annual postseason men's basketball tournament for the Big Ten Conference and was played from March 4 through March 7, 1999, at the United Center in Chicago, Illinois. The championship was won by Michigan State who defeated Illinois in the championship game. As a result, Michigan State received the Big Ten's automatic bid to the NCAA tournament.

Due to Michigan basketball scandal, Michigan has vacated the records from this tournament. Similarly, due to the Minnesota academic scandal, Minnesota's appearance in this tournament was vacated. Ohio State also vacated its appearance in the tournament due to NCAA Sanctions.

Seeds
All Big Ten schools participated in the tournament. Teams were seeded by conference record, with a tiebreaker system used to seed teams with identical conference records. Seeding for the tournament was determined at the close of the regular conference season. The top five teams received a first round bye.

All-Tournament Team
Source
 * Mateen Cleaves, Michigan State – Big Ten tournament Most Outstanding Player
 * Cory Bradford, Illinois
 * Antonio Smith, Michigan State
 * Evan Eschmeyer, Northwestern
 * Michael Redd, Ohio State