The 2019 NCAA Division III men's basketball tournament was a single-elimination tournament to determine the national champion of men's NCAA Division III college basketball in the United States.

The national semifinal and championship rounds was held for the first time at the Allen County War Memorial Coliseum in Fort Wayne, Indiana.

[1] The following 21 teams were awarded qualification for the 2018 NCAA field by the NCAA Division III Men's Basketball Committee.

[1] The committee evaluated teams on the basis of their win–loss percentage, strength of schedule, head-to-head results, results against common opponents, and results against teams included in the NCAA's final regional rankings.

Pool B is for teams that are either independents or whose conference does not yet qualify for an automatic bid.