Alcheh Island (Bulgarian: остров Алшех, romanized: ostrov Alcheh, IPA: [ˈɔstrof ɐɫˈʃɛx]) 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.

This article includes information from the Antarctic Place-names Commission of Bulgaria which is used with permission.

This Biscoe Islands location article is a stub.