The 2019–20 Loyola Marymount Lions men's basketball team represented Loyola Marymount University during the 2019–20 NCAA Division I men's basketball season. The Lions were led by sixth-year head coach Mike Dunlap. They played their home games at Gersten Pavilion in Los Angeles, California as members of the West Coast Conference. They finished the season 11–21 overall and 4–12 in WCC play to finish in eighth place. They defeated San Diego in the first round of the WCC tournament before losing in the second round to San Francisco.