The 2018–19 Texas Tech Red Raiders basketball team represented Texas Tech University in the 2018–19 NCAA Division I men's basketball season as a member of the Big 12 Conference.

They played their home games at the United Supermarkets Arena in Lubbock, Texas.

They received an at-large bid to the NCAA tournament, where they defeated Northern Kentucky, Buffalo, Michigan and Gonzaga to advance to their first Final Four in school history.

They defeated Baylor in the quarterfinals of the Big 12 tournament before losing in the semifinals to West Virginia.

They received an at-large bid to the NCAA tournament where they defeated Stephen F. Austin, Florida, and Purdue to advance to the Elite Eight for the first time in school history.