Ross Patterson Alger (August 20, 1920 – January 16, 1992) was a politician in the Canadian province of Alberta, who served as mayor of Calgary from 1977 to 1980.Born in Prelate, Saskatchewan, he moved to Alberta with his family in 1930s. He received a bachelor of commerce degree from the University of Alberta in 1942. He served with the Royal Canadian Air Force during World War II. After the war, he received an MBA from the University of Toronto.