Kalmar Island (Bulgarian: остров Калмар, romanized: ostrov Kalmar, IPA: [ˈɔstrof kɐɫ'mar]) is the mostly ice-covered island 1.12 km long in west-southwest to east-northeast direction and 245 m wide in the Dannebrog Islands group of Wilhelm Archipelago in the Antarctic Peninsula region.

Its surface area is 16.15 ha.

[1] The feature is so named because of its shape supposedly resembling a specimen of squid ('kalmar' 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.