2018–19 Big 12 Conference men's basketball season
The 2018–19 Big 12 men's basketball season began with practices in October 2018, followed by the start of the 2018–19 NCAA Division I men's basketball season in November. Regular season conference play began in December 2018 and concluded in March 2018. Kansas State and Texas Tech won a share of the regular season Big 12 Championship, ending the streak of 14 consecutive conference titles for Kansas.
The Big 12 Tournament was held from March 13 through 16 at the Sprint Center in Kansas City, Missouri. Iowa State defeated Kansas in the Big 12 Tournament championship game to receive the conference's automatic bid to the NCAA Tournament.
Baylor, Iowa State, Kansas, Kansas State, Oklahoma, and Texas Tech each received invitations to the NCAA Tournament. Texas Tech advanced to the NCAA championship game where they lost to Virginia.
Coaches
Coaching changes
There were no head coaching changes following the 2017–18 Big 12 Conference men's basketball season.Head coaches
Note: Stats are through the beginning of the season. All stats and records are from time at current school only.| Team | Head coach | Previous job | Seasons at school | Overall record | Big 12 record | NCAA Tournaments | NCAA Final Fours | NCAA Championships |
| Baylor | Scott Drew | Valparaiso | 15th | 7 | 0 | 0 | ||
| Iowa State | Steve Prohm | Murray State | 4th | 2 | 0 | 0 | ||
| Kansas | Bill Self | Illinois | 16th | 15 | 3 | 1 | ||
| Kansas State | Bruce Weber | Illinois | 7th | 4 | 0 | 0 | ||
| Oklahoma | Lon Kruger | UNLV | 8th | 6 | 1 | 0 | ||
| Oklahoma State | Mike Boynton | Oklahoma State | 2nd | 0 | 0 | 0 | ||
| TCU | Jamie Dixon | Pittsburgh | 4rd | 1 | 0 | 0 | ||
| Texas | Shaka Smart | VCU | 4th | 2 | 0 | 0 | ||
| Texas Tech | Chris Beard | Little Rock | 3rd | 1 | 0 | 0 | ||
| West Virginia | Bob Huggins | Kansas State | 12th | 9 | 1 | 0 |
Preseason
Big 12 Preseason PollPre-Season All-Big 12 Team
- Player of the Year: Dean Wade, Kansas State
- Newcomer of the Year: Dedric Lawson, Kansas
- Freshman of the Year: Quentin Grimes, Kansas
Rankings
Regular season
Conference Matrix
Big 12/SEC Challenge
Postseason
Big 12 Tournament
- March 13–16, 2019–Big 12 Conference Basketball Tournament, Sprint Center, Kansas City, MO.
Bracket
NCAA Tournament
| Seed | Region | School | First Round | Second Round | Sweet 16 | Elite Eight | Final Four | Championship |
| 3 | West | Texas Tech | #14 Northern Kentucky - March 22, Tulsa - W, 72–57 | #6 Buffalo - March 24, Tulsa - W, 78–58 | #2 Michigan - March 28, Anaheim - W, 63–44 | #1 Gonzaga - March 30, Anaheim - W, 75–69 | #2 Michigan State - April 6, Minneapolis - W, 71-51 | #1 Virginia - April 8, Minneapolis - L, 77-85 OT |
| 4 | Midwest | Kansas | #13 Northeastern - March 21, Salt Lake City - W, 87–53 | #5 Auburn - March 23, Salt Lake City - L, 75–89 | ||||
| 4 | South | Kansas State | #13 UC Irvine - March 22, San Jose - L, 64–70 | |||||
| 6 | Midwest | Iowa State | #11 Ohio State - March 22, Tulsa - L, 59–62 | |||||
| 9 | West | Baylor | #8 Syracuse - March 21, Salt Lake City - W, 78–69 | #1 Gonzaga - March 23, Salt Lake City - L, 71–83 | ||||
| 9 | South | Oklahoma | #8 Ole Miss - March 22, Columbia - W, 95–72 | #1 Virginia - March 24, Columbia - L, 51–63 | ||||
| 6 Bids | W-L : | 4–2 | 1–3 | 1–0 | 1–0 | 1–0 | TOTAL:''' 8–6 |
NIT
| Seed | Region | School | First Round | Second Round | Quarterfinals | Semifinals | Final |
| 1 | TCU | TCU | #8 Sam Houston State - March 20, Fort Worth - W, 82–69 | #4 Nebraska - March 24, Fort Worth - W, 88–72 | #2 Creighton - March 26, Fort Worth - W, 71–58 | #2 Texas - April 2, New York City - L, 44–58 | |
| 2 | Alabama | Texas | #7 South Dakota State - March 19, Austin - W, 79–73 | #3 Xavier - March 24, Austin - W, 78–76OT | #4 Colorado - March 27, Austin - W, 68–55 | #1 TCU - April 2, New York City - W, 58–44 | #5 Lipscomb - April 4, New York City - W, 81–66 |
| 2 Bids | W-L : | 2–0 | 2–0 | 2–0 | 1–1 | TOTAL: 8–1 |
College Basketball Invitational
| School | First Round | Quarterfinals | Semifinals | Finals |
| West Virginia | Grand Canyon - March 20, Morgantown - W, 77–63 | Coastal Carolina - March 25, Morgantown - L, 91–109 | ||
| W-L : | 1–0 | 0–1 | TOTAL: 1–1 |
Honors and awards
All-Americans
To earn "consensus" status, a player must win honors from a majority of the following teams: theAssociated Press, the USBWA, Sporting News, and the National Association of Basketball Coaches.
All-Big 12 awards and teams
Phillips 66 Big 12 Men’s Basketball Weekly Awards
| Week | Player of the Week | School | Newcomer of the Week | School | Ref. |
| Nov 12 | Dedric Lawson | Kansas | Quentin Grimes | Kansas | |
| Nov 19 | Lagerald Vick | Kansas | Talen Horton-Tucker Jaxson Hayes | Iowa State Texas | |
| Nov 26 | Dedric Lawson | Kansas | Jaxson Hayes | Texas | |
| Dec 3 | Lagerald Vick | Kansas | Dedric Lawson | Kansas | |
| Dec 10 | Christian James | Oklahoma | Tyrese Haliburton | Iowa State | |
| Dec 17 | Jarrett Culver | Texas Tech | Dedric Lawson | Kansas | |
| Dec 26 | Dedric Lawson | Kansas | Miles Reynolds Curtis Jones | Oklahoma Oklahoma State | |
| Dec 30 | Tristan Clark | Baylor | Devon Dotson | Kansas | |
| Jan 7 | Marial Shayok | Iowa State | Tyrese Haliburton | Iowa State | |
| Jan 14 | Barry Brown | Kansas State | Dedric Lawson | Kansas | |
| Jan 21 | King McClure Dean Wade | Baylor Kansas State | Marial Shayok | Iowa State | |
| Jan 28 | Kouat Noi | TCU | Makai Mason Dedric Lawson | Baylor Kansas | |
| Feb 4 | Makai Mason | Baylor | Ochai Agbaji | Kansas | |
| Feb 11 | Desmond Bane | TCU | Dedric Lawson Courtney Ramey | Kansas Texas | |
| Feb 18 | Lindell Wigginton | Iowa State | Talen Horton-Tucker | Iowa State | |
| Feb 25 | Jarrett Culver | Texas Tech | Jared Butler | Baylor | |
| Mar 4 | Jase Febres | Texas | Jordan McCabe | West Virginia | |
| Mar 11 | Jarrett Culver | Texas Tech | Yor Anei | Oklahoma State |