Carl T. "Pill" Nelson (December 23, 1900 – January 21, 1978) was an American football player and coach. He served as the head football coach at Beloit College in Beloit, Wisconsin from 1950 to 1961 and Milton College in Milton, Wisconsin from 1962 to 1964, compiling a career college football coaching record of 70–46–1. Nelson also the athletic director at Milton from 1965 until his retirement in 1967. He also coached track and golf at the school. Nelson on January 21, 1978, at Beloit Memorial Hospital in Beloit.