Charles Otis Gill (March 4, 1868 – June 2, 1959) was an American Congregationalist clergyman. With Gifford Pinchot he co-authored two influential books on the state of rural churches in the United States.Gill played American football for Yale University from 1885 to 1889. He was Captain of the Yale team and was on the first College Football All-America Team in 1889.He was the head coach of the California (1894) and New Hampshire (1908) college football programs.