| Alcheh Island | |
| Map: | Antarctica#Antarctic Peninsula |
| Map Relief: | yes |
| Location: | Antarctica |
| Coordinates: | -66.4131°N -67.0917°W |
| Archipelago: | Biscoe Islands |
| Area Ha: | 21.72 |
| Length M: | 900 |
| Width M: | 340 |
| Population: | uninhabited |
| Country: | None |
| Treaty System: | Antarctic Treaty System |
Alcheh Island (bg|остров Алшех|ostrov Alcheh, pronounced as /bg/) is the ice-covered island in the Barcroft group of Biscoe Islands in Antarctica 900 m long in south-southwest to north-northeast direction and 340 m wide. Its surface area is 21.72 ha.
The feature is named after the Bulgarian Argentine architect Deiana Alcheh for her support for the infrastructure development of the Bulgarian Antarctic base.
Alcheh Island is centred at -66.4131°N -67.0917°W,[1] which is 1.95 km southeast of Watkins Island, 305 m west of Irving Island and 500 m east of St. Brigid Island. British mapping in 1976.