Gleb Wataghin (November 3, 1899 in Birzula, Russian Empire, now Podilsk, Odesa Region, Ukraine – October 10, 1986 in Turin, Italy) was an Italian theoretical and experimental physicist and a great scientific leader who gave a great impulse to the teaching and research on physics in two continents: in the University of São Paulo, São Paulo, Brazil; and in the University of Turin, Turin, Italy.

In 1918, he graduated from the gymnasium and entered the University of St. Volodymyr in Kyiv then in Ukrainian People's Republic.

Wataghin engaged in 1934 with other European physicists in a big project of creation of a new Department of Physics of the recently founded University of São Paulo.

There, he was the tutor of a group of young physicists, such as César Lattes, Oscar Sala, Mário Schenberg, Roberto Salmeron, Marcelo Damy de Souza Santos and Jayme Tiomno.

He was awarded the Feltrinelli Prize in 1951 and was national member of the Accademia Nazionale dei Lincei, from 1960.