The 2015–16 Northern Arizona Lumberjacks men's basketball team represented Northern Arizona University during the 2015–16 NCAA Division I men's basketball season.

The Lumberjacks were led by fourth year head coach Jack Murphy and played their home games at the Walkup Skydome, with one home game at the Rolle Activity Center.

They lost in the first round of the Big Sky tournament to Eastern Washington.

They advanced to the semifinals of the Big Sky tournament where they lost to Montana.

They were invited to the CollegeInsider.com Tournament where they defeated Grand Canyon, Sacramento State, Kent State, and NJIT to advance to the CIT championship game where they lost to Evansville.