The 2011 Phillips 66 Big 12 Men's Basketball Championship was the 2011 edition of the Big 12 Conference's championship tournament held at the Sprint Center in Kansas City, Missouri from March 9 until March 12, 2011.

The Tournament consisted of a 12 team single-elimination tournament with the top 4 seeds receiving a bye.

[2] Asterisk denotes game ended in overtime.

Rankings reflect AP Poll for week of 3/7/2011.

Most Outstanding Player – Marcus Morris, Kansas[3]