Leland Lester Mendenhall (January 6, 1892 – October 4, 1970) was an American football, basketball and baseball coach.
He served as the head football coach (1921 to 1924), head men's basketball coach (1921 to 1924) and head baseball coach (1922 to 1923) at the University of Northern Iowa (then known as Iowa State Teachers College) in Cedar Falls, Iowa.Mendenhall was a 1916 football letter winner at the University of Iowa.