Konstantin "Kosta" Vojnović (Serbian Cyrillic: Константин Војновић; Serbian pronunciation: [konstǎntin kôsta ʋǒːjnoʋit͡ɕ]; March 2, 1832 – May 20, 1903) was a Croatian Serb politician, university professor and rector in the kingdoms of Dalmatia and Croatia-Slavonia of the Habsburg monarchy.