The 1988–89 Loyola Marymount Lions men's basketball team represented Loyola Marymount University during the 1988–89 NCAA Division I men's basketball season.

The Lions were led by fourth-year head coach Paul Westhead.

They played their home games at Gersten Pavilion in Los Angeles, California as members of the West Coast Conference.

LMU led the nation in scoring (112.5 points per game) for the second consecutive year.

Junior All-American Hank Gathers became the second player in NCAA Division I history to lead the nation in scoring (32.7) and rebounding (13.7) in the same season.