Sandalj Hranić Kosača (Serbian: Сандаљ Хранић Косача; 1370 - 15 March 1435) was a medieval noble from the House of Kosača. He ruled the area between Neretva and Drina rivers in Bosnia with the title Grand Duke of Hum between 1392 and his death in 1435.
As the head of the House of Kosača, Sandalj Hranić succeeded his uncle Vlatko Vuković, and after 1419, he became the most powerful man in Bosnia. After he took part in the conspiracy to kill Pavle Radenović in 1415, Hranić came in conflict with Pavlović family. In fighting against them, he allied with Ottoman Empire. He often had conflicts with King Stephen Tvrtko II of Bosnia, even refusing to attend his wedding to Dorothy Garai in 1428.
He was married three times, but had no children. After his death, he was succeeded by his nephew Stjepan Vukčić Kosača.
| Regnal titles | ||
|---|---|---|
| Preceded by Vlatko Vuković |
Grand Duke of Hum 1392–1435 |
Succeeded by Stjepan Vukčić Kosača |