The 1979–80 Loyola Marymount Lions men's basketball team represented Loyola Marymount University during the 1979–80 NCAA Division I men's basketball season.

The Lions were led by first-year head coach Ron Jacobs.

They played their home games at Loyola Memorial Gymnasium in Los Angeles, California as members of the West Coast Athletic Conference.

12 seed in the West region, the Lions were beaten by No.

5 seed Arizona State, 99–71 in the opening round.