Ronald J. Mellor (born September 30, 1940) is a distinguished professor of history at the University of California, Los Angeles.^[1] His area of research has been ancient religion and Roman historiography, where he has published a number of books.^[2][3]

Mellor attended Regis High School in New York City.^[4] He received his Ph.D. in Classics from Princeton University in 1968. His previous teaching posts include Stanford University. He has been a Visiting Fellow/Scholar at University College, London, the Humanities Research Centre of the Australian National University, the American Academy in Rome, and the Institute for Advanced Study in Princeton, New Jersey.^[2]