The 2023–24 Northern Arizona Lumberjacks men's basketball team represented Northern Arizona University in the 2023–24 NCAA Division I men's basketball season.

They were led by fifth-year head coach Shane Burcar and split their home games between Rolle Activity Center and Findlay Toyota Court.

The Lumberjacks competed as members of the Big Sky Conference.

In the Big Sky tournament, the team defeated Idaho, top-seeded Eastern Washington, and Montana to advance to the championship game.

Had they clinched the auto-bid, the Lumberjacks would have had the lowest winning-percentage of any team in NCAA Tournament history.