The 2020–21 Loyola Marymount Lions men's basketball team represented Loyola Marymount University during the 2020–21 NCAA Division I men's basketball season.

The Lions were led by first-year head coach Stan Johnson.

They played their home games at Gersten Pavilion in Los Angeles, California as members of the West Coast Conference The Lions finished the season 11–21 overall and 4–12 in WCC play to finish in eighth place.

On March 8, 2020, head coach Mike Dunlap was fired.

On March 20, the school announced that Marquette associate head coach Stan Johnson had been named the new head coach of the Lions.