Walter George Muelder (1907–2004) was an American social ethicist, public theologian, ecumenist, and Methodist minister. He studied under Edgar S. Brightman at Boston University and began his teaching career at Berea College and the University of Southern California. He served as Dean of Boston University School of Theology from 1945 to 1972, and was known as the "Red Dean" because of his socialist and pacifist leanings. Muelder died on June 12, 2004, in Boston, Massachusetts.