Spatnik Island (Bulgarian: остров Спътник, romanized: ostrov Spatnik, IPA: [ˈɔstrof ˈspɤtnik]) is the partly ice-free island 485 m long in west–east direction and 290 m wide in the Dannebrog Islands group of Wilhelm Archipelago in the Antarctic Peninsula region.

Its surface area is 6.62 ha.

[1] The feature is so named because of its shape supposedly resembling a communications satellite ('spatnik' in Bulgarian), 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.