Clifford Williams (born 1943) is an American professor of Philosophy at Wheaton College, Wheaton, Illinois. He is also Professor Emeritus of Philosophy at Trinity International University, Deerfield, Illinois. Williams graduated from Wheaton College in 1964 and from Indiana University with a Ph.D. in philosophy in 1972. He taught at St. John Fisher College in Rochester, New York from 1968 to 1982 with the exception of one semester at Houghton College. He then taught at Trinity International University from 1982 to 2012, becoming the chair of the philosophy department, with the exception of 1998–1999, where he taught at Wheaton College. He rejoined the faculty of Wheaton College in 2013. Williams is a historian of contemporary hobo culture and a part-time hobo, known in that subculture as "Oats."