2015–16 Big 12 Conference men's basketball season

The 2015–16 Big 12 men's basketball season was the 20th season of basketball for the Big 12 Conference. Team practices began in October 2015, followed by the start of the regular season on November 13. Conference play began on January 2, 2016, and concluded on March 5. Kansas won their 12th straight Big 12 regular season championship by finishing 33–5 overall and 15–3 in conference play, two games ahead of second-place West Virginia. The 2016 Big 12 men's basketball tournament took place from March 9–12, 2016 at the Sprint Center in Kansas City. Kansas won the tournament for the 10th time in school history.

Buddy Hield of Oklahoma was named Big 12 Player of the Year for the second consecutive year, and became just the third player in conference history to be named the National college player of the year.

Seven schools were awarded a berth to the NCAA tournament. Kansas, Oklahoma, and Iowa State each reached the Sweet 16, with Oklahoma advancing all the way to the Final four before losing to the eventual champions Villanova.

Preseason
(#) first place votes

Pre-Season All-Big 12 Team
 * Player of the Year: Buddy Hield, Oklahoma
 * Newcomer of the Year: Deonte Burton, Iowa State
 * Freshman of the Year: Cheick Diallo, Kansas

Big 12 tournament

 * March 9–12, 2016–Big 12 Conference Basketball Tournament, Sprint Center, Kansas City, MO.