Raymond Thayer Birge (March 13, 1887 – March 22, 1980) was a physicist. Born in Brooklyn, New York, into an academic scientific family, Birge obtained his Doctor's Degree from the University of Wisconsin–Madison in 1913. In the same year he married Irene A. Walsh. The Birges had two children, Carolyn Elizabeth (Mrs. E.D. Yocky) and Robert Walsh, Associate Director of the Lawrence Berkeley National Laboratory in 1973-1981. After five years as an instructor at Syracuse University, he became a member of the physics department at University of California, Berkeley where he remained until he retired, as chairman, in 1955.