Stjepan Jovanović (Stephan Freiherr (Baron) von Jovanovich; 5 January 1828 – 8 December 1885) was a Croat military commander of the Austrian Empire from the Military Frontier.
Jovanović was born in the village of Pazarište near Gospić in Lika (then Military Frontier, Austrian Empire, today Croatia). He joined the Austrian army in 1845 and during 1848–1849 fought under general Radetzky in Italy. In 1850 he was transferred to the General staff and later served as an adjutant of general Gabriel Rodić in southern Dalmatia.
Between 1861 and 1865 Jovanović served as Austrian consul general in Sarajevo. Because of his knowledge of Bosnia, Herzegovina, Montenegro and Krivošije, he was recalled up into the army in 1865, as a colonel. In 1866, during the Austro-Prussian War he fought in Italy under archduke Albert. During the 1869 insurrection in Boka Kotorska, he commanded a Gebirgsjäger (mountain troops) brigade in Kotor (Cattaro) that tried to suppress the uprising, but failed.