Rustum Roy (July 3, 1924 – August 26, 2010) was a physicist, born in India, who became a professor at Pennsylvania State University and was a leader in materials research. As an advocate for interdisciplinarity, he initiated a movement of materials research societies and, outside of his multiple areas of scientific and engineering expertise, wrote impassioned pleas about the need for a fusion of religion and science and humanistic causes.
Later in life he held visiting professorships in materials science at Arizona State University, and in medicine at the University of Arizona.