| Helena of Serbia | |||||
|---|---|---|---|---|---|
 Helena, depicted as witnessing the execution of one of her husband's enemies, in the Chronicon Pictum | |||||
| Queen consort of Hungary | |||||
| Tenure | 1131–1141 | ||||
| Born | after 1109 | ||||
| Died | after 1146 | ||||
| Spouse | Béla II of Hungary | ||||
| Issue | |||||
| |||||
| House | Vukanović | ||||
| Father | Uroš I of Serbia | ||||
| Mother | Anna Diogene | ||||
| Religion | Roman Catholicism, previously Eastern Orthodoxy | ||||
Helena of Serbia (Serbian: Јелена/Jelena, Hungarian: Ilona; b. after 1109 – after 1146) was Queen of Hungary as the wife of King Béla II. After her husband's death, she governed Hungary as regent from 1141 to September 1146 together with her brother, Beloš, during the minority of her eldest son, Géza II, came of age.
A daughter of Prince Uroš I of Serbia (r. ca. 1112–1145), she was arranged to marry Béla II in 1129 by his cousin, King Stephen II (r. 1116–1131). Her younger sons, Ladislaus II and Stephen IV, also ruled as kings of Hungary. She had two other brothers Uroš II and Desa besides Beloš.