1986 Big Eight Conference men's basketball tournament

The 1986 Big Eight men's basketball tournament was held March 6–8 at Kemper Arena in Kansas City, Missouri.

Top-seeded Kansas defeated #2 seed Iowa State in the championship game, 73–71, to win the Big Eight men's basketball tournament.

The Jayhawks received an automatic bid to the 1986 NCAA tournament. They were joined in the tournament by fellow Big Eight members Iowa State, Missouri, Nebraska, and Oklahoma, who earned at-large bids.

Format
All eight of the conference's members participated in the tournament field. They were seeded based on regular season conference records, with all teams placed and paired in the initial quarterfinal round.

All three rounds – quarterfinals, semifinals and championship game – were played at Kemper Arena in Kansas City, Missouri.