Catherine of Hungary (Hungarian: Katalin, Serbian: Каталина, romanized: Katalina; c. 1256 – after 1314) was a Queen consort of Serbia by her marriage to Stefan Dragutin. Catherine was the second daughter of Stephen V of Hungary and his wife Elizabeth, daughter of Seyhan, chieftain of the Cumans.
Stefan Dragutin (Serbian Cyrillic: Стефан Драгутин, Hungarian: Dragutin István; died 12 March 1316), was King of Serbia from 1276 to 1282. From 1282, he ruled a separate kingdom which included northern Serbia, and (from 1284) the neighboring Hungarian banates (or border provinces), for which he was unofficially styled "King of Syrmia".
He was the eldest son of King Stefan Uroš I of Serbia and Queen Helen. Dragutin married Catherine of Hungary, likely after his father concluded a peace treaty with her grandfather, Béla IV of Hungary, in 1268. By 1271, he received the title of "young king" in recognition of his right to succeed his father. He rebelled against his father, and with Hungarian assistance, forced him to abdicate in 1276.