Giulio (Yoel) Racah (1909 - August 28, 1965) was an Israeli physicist and mathematician.
Born in Florence, Italy, he took his PhD from the University there in 1930, and later studied in Rome with Enrico Fermi. In 1939 Racah immigrated to Palestine, and was appointed Professor of Theoretical Physics at the Hebrew University of Jerusalem, where he was later Dean of the Faculty of Sciences, and finally Rector and acting President.
Racah's research was mainly in the fields of quantum physics and atomic spectroscopy. In 1958 he was awarded the Israel Prize for lifetime contribution to physics.