| Ali ibn Mas'udPersian: علی ابن مسعود | |
| Succession: | Sultan of the Ghaznavid Empire |
| Reign: | 1048–1049 |
| Predecessor: | Mas'ud II |
| Successor: | Abd al-Rashid of Ghazna |
| Dynasty: | Ghaznavid |
| Father: | Mas'ud I |
| Religion: | Sunni Islam |
Ali ibn Mas'ud was the Ghaznavid sultan, ruling from 1048 to 1049. The son of Mas'ud I, Ali succeeded his nephew Mas'ud II . Although Abdur Rashid sent an army led by his vizier to Sistan to arrest Ghaznavi, the vizier changed sides and defeated Ali and replaced him with Abd al-Rashid and he was killed in 1050.