Žarko (Serbian Cyrillic: Жарко; 1336–before 1371) was a 14th-century Serbian nobleman. After the death of Serbian Emperor Dušan the Mighty (r. 1331–1355†), he became a lord of the coasts of the Zeta region, under the succeeding Emperor Uroš the Weak (r. 1355–1371). Around 1356 he married Teodora Dejanović, the daughter of Dejan Dragaš and Theodora Nemanjić (sister of Dušan and Symeon Siniša). Together, they had a son, Mrkša, in 1363.