Tyulen Island (Bulgarian: остров Тюлен, romanized: ostrov Tyulen, IPA: [ˈɔstrof tʲuˈlɛn]) is the mostly ice-covered island 1 km long in west-southwest to east-northeast direction and 530 m wide in the Dannebrog Islands group of Wilhelm Archipelago in the Antarctic Peninsula region.

Its surface area is 26.78 ha.

[1] The feature is so named because of its shape supposedly resembling a fur seal, 'tyulen' being the Bulgarian for 'seal', and in association with other descriptive names of islands in the area.

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

This Wilhelm Archipelago location article is a stub.