Ivan Supek (born 18.04.1915) was a Yugoslav physicist and a member of the Yugoslav Academy of Sciences and Arts (1947). He was born in Zagreb. He graduated from the University of Zagreb (1939), where he was professor from 1945. He was the founder and in 1950 —57 director of the R. Bošković Institute (Zagreb). From 1961 he was also president of the Institute for the Philosophy of Science and Peace of the Yugoslav Academy of Sciences and Arts (Zagreb).
His work was in the fields of theoretical physics, atomic and nuclear physics, and the philosophy of science. He was the founder and editor of a number of scientific journals. The R. Bošković Prize (1960).