Oscar Douglas Skelton (July 13, 1878 – January 28, 1941) was a Canadian professor, author, civil servant, and politician.
He earned his M.A. from Queen's University in 1900, and his doctorate in political economy from the University of Chicago in 1908. He taught at Queen's University until 1925, where he also served in the university's administration. Skelton served as Chair of the university's board of trustees.