Charles Louis Fefferman (born April 18, 1949) is a renowned mathematician at Princeton. He won the Fields medal in 1978 for work in mathematical analysis. Another notable honour attached to his name is that of being the youngest full time professor at a universty in the United States. Indeed, after receiving his bachelor's degree at the age of 17 from the University of Maryland and a PhD at 20 from Princeton University, Fefferman received a full time position at the University of Chicago at the age of 22. At 24, he returned to Princeton to assume a full time professorship there - a position he still holds.

His early work included a study of the asymptotics of the Bergmann kernel off the boundaries of pseudoconvex domains in .