Charles R. Bentley (born 1931, Rochester, New York) is an American glaciologist and geophysicist. He is a professor emeritus at the University of Wisconsin–Madison. Mount Bentley and the Bentley Subglacial Trench in Antarctica are named after him. In 1957, he and a handful of other scientists including Mario Giovinetto set out on an expedition across West Antarctica in tracked vehicles to make the first measurements of the ice sheet.
He was awarded the Seligman Crystal by the International Glaciological Society in 1990.