William Grosvenor Pollard (1911–1989) was an American physicist and an Episcopal priest. He started his career as a professor of physics in 1936 at the University of Tennessee. In 1946 he championed the organization of the Oak Ridge Institute of Nuclear Studies (ORINS). He was its executive director until 1974. He was ordained as a priest in 1954. He authored and co-authored a significant amount of material in the areas of Christianity and Science and Religion found in books, book chapters, and journal articles. He was sometimes referred to as the "atomic deacon".