Stjepan Musulin (1885 in Sremska Mitrovica, Kingdom of Croatia-Slavonia, Austria-Hungary – 1969) was a Yugoslav linguist, comparative Slavicist, philologist, lexicographer and translator.
He is recognized as one of the greatest contributors to the development of Czech studies in Yugoslavia.
He was the first lecturer on Czech language in the Philosophical Faculty at the University of Zagreb.
His daughter was the famous pianist Branka Musulin, who had studied with Svetislav Stančić in Zagreb and Alfred Cortot in Paris.
While he worked in gymnasium, he was the classmaster to famous Croatian poet Dobriša Cesarić.