2023–24 Big 12 Conference men's basketball season

The 2023–24 Big 12 men's basketball season began with the start of the 2023–24 NCAA Division I men's basketball season in November. Regular season conference play was played from December 2023 and concluded in March 2023, with Houston winning their first regular season title in their first year in the Big 12. The 2024 Big 12 men's basketball tournament was held March 12–16, 2024, at the T-Mobile Center in Kansas City, Missouri, with Iowa State winning the conference tournament, their sixth overall.

This was the first and only season for the Big 12 Conference with 14 teams before expanding to 16 teams in 2024.

Head coaches
Note: Stats are through the beginning of the season. All stats and records are from time at current school only. ''† All of the Jayhawks postseason victories and 7 of their regular season wins were vacated from the 2017-18 season. Officially, their record for the season 16-8 overall and 3-5 in conference play. The Jayhawks regular season Big 12 championship and their Big 12 Tournament championship were vacated. The Jayhawks entire NCAA Tournament appearance from the season was vacated including their Final Four appearance.''

* Terry was named interim coach during the 2022-23 season and officially named head coach at season end.

Preseason
Big 12 Preseason Poll

Pre-Season All-Big 12 Team
 * Player of the Year: Hunter Dickinson, Kansas
 * Newcomer of the Year: Hunter Dickinson, Kansas
 * Freshman of the Year: Ja’Kobe Walter, Baylor

Preseason watchlists
Below is a table of notable preseason watch lists.

Conference matrix
Thru Mar. 9, 2024.

Record vs Other Conferences
The Big 12 had a record of 49–7 in non-conference play.

Big 12 tournament

 * March 12–16, T-Mobile Center, Kansas City, MO.

Bracket
* denotes overtime period

All-Big 12 awards and teams
Honorable Mention: Langston Love (Baylor), Yves Missi (Baylor), Dallin Hall (BYU), Spencer Johnson (BYU), Jaxson Robinson (BYU), Fousseyni Traore (BYU), Ibrahima Diallo (UCF), Darius Johnson (UCF), Jaylin Sellers (UCF),Aziz Bandaogo (Cincinnati), Dan Skillings Jr. (Cincinnati), Ja’Vier Francis (Houston), Emanuel Sharp (Houston), KJ Adams Jr. (Kansas), Johnny Furphy (Kansas), Dajuan Harris Jr. (Kansas), Arthur Kaluma (K-State), Tylor Perry (K-State), Javian McCollum (Oklahoma), Jalon Moore (Oklahoma), Javon Small (Oklahoma State), Jameer Nelson Jr. (TCU), Micah Peavy (TCU), Joe Toussaint (Texas Tech)