| Maria of Serbia | |
|---|---|
 | |
| Queen consort of Bosnia | |
| Tenure | 10 July 1461 – 5 June 1463 |
| Despoina consort of Serbia | |
| Tenure | 1 April 1459 – 20 June 1459 |
| Born | c. 1447 Smederevo, Serbia |
| Died | c. 1500 Çorlu, Ottoman Empire |
| Spouse | Stephen Tomašević, King of Bosnia |
| House | Branković |
| Father | Lazar Branković, Despot of Serbia |
| Mother | Helena Palaiologina |
Maria of Serbia (Serbian Cyrillic: Мара Бранковић, romanized: Mara Branković; c. 1447 – c. 1500), christened Helena (Serbian Cyrillic: Јелена, romanized: Jelena), was the last queen of Bosnia and despoina of Serbia. As the eldest daughter of the deceased despot of Serbia, Lazar Branković, the 12-year-old Helena was given in marriage to the Bosnian prince Stephen Tomašević in 1459. She then took the name Maria, while her husband obtained the title to Serbia through her. The country was lost to the Ottomans within a few months, and the couple fled to Bosnia. Maria's husband ascended the Bosnian throne in 1461, but two years later the kingdom too fell to the Ottomans and he was executed. The widowed queen avoided capture by fleeing to the coast. Having spent a few years in Venetian Dalmatia and possibly Hungary, Maria settled in Ottoman Greece at the court of her aunts Mara and Kantakouzene, where she spent her life in a string of conflicts and legal disputes with Kantakouzene, the Republic of Ragusa, and the Athonite monasteries.