| Knezha Island | |
| Map: | Antarctic Peninsula |
| Location: | Antarctica |
| Coordinates: | -65.3578°N -65.3672°W |
| Archipelago: | Biscoe Islands |
| Population: | 0 |
| Country: | None |
| Treaty System: | Antarctic Treaty System |
Knezha Island (bg|остров Кнежа|ostrov Knezha, pronounced as /bg/) is the northernmost island in the Pitt group of Biscoe Islands, Antarctica. The feature extends 900 m in north-south direction and 880 m in east-west direction.
The island is named after the town of Knezha in Northern Bulgaria.
Knezha Island is located at -65.3578°N -65.3672°W, 4.53 km northwest of Trundle Island, 780 m north-northwest of Ribnik Island and 2.62 km southeast of Bardell Rock. British mapping in 1971.