The 2018 Phillips 66 Big 12 men's basketball tournament was a postseason men's basketball tournament for the Big 12 Conference.

It was played from March 7 to 10, in Kansas City, Missouri at the Sprint Center.

[2] Kansas defeated West Virginia in the championship game to win the tournament and receive the conference's automatic bid to the NCAA tournament.

The Jayhawks tournament win was later vacated by the NCAA due to recruiting violations.

These are the tiebreakers (5–8 involve both ties with two teams and ties with multiple teams): * Indicates overtime game[7] Most Outstanding Player – Malik Newman, Kansas[5]