The 2018–19 Ohio State Buckeyes men's basketball team represented Ohio State University in the 2018–19 NCAA Division I men's basketball season.

The Buckeyes played their home games at Value City Arena in Columbus, Ohio as members of the Big Ten Conference.

8 seed in the Big Ten tournament, they defeated Indiana in the second round before losing to Michigan State in the quarterfinals.

2 seed in the Big Ten tournament, they lost to Penn State in the quarterfinals.

*AP does not release post-NCAA Tournament rankings 2018–19 Ohio State Buckeyes women's basketball team