The 1997–98 Northern Arizona Lumberjacks men's basketball team represented Northern Arizona University in the 1997-98 NCAA Division I men's basketball season.

The Lumberjacks were led by head coach Ben Howland, and played their home games at the Walkup Skydome as members of the Big Sky Conference.

After finishing atop the conference regular season standings, Northern Arizona won the Big Sky tournament to receive an automatic bid to the NCAA tournament – the first appearance in school history.

15 seed in the West region, the Lumberjacks lost to No.

2 seed Cincinnati in the opening round, 65–62.