Luna Island (Bulgarian: остров Луна, romanized: ostrov Luna, IPA: [ˈɔstrof ˈɫunɐ]) is the partly ice-covered rocky island in the southwest part of Biscoe Islands, Antarctica, 637 m long in southwest-northeast direction and 165 m wide, and comprising two parts divided by a passage narrowing to 5 m. Its surface area is 6.55 ha.

The feature is named after Ines Luna Aguilar from the Chilean city of Punta Arenas for her logistic support for the Bulgarian Antarctic programme.

Luna Island is centred at 66°23′01″S 67°09′42″W / 66.38361°S 67.16167°W / -66.38361; -67.16167, which is 92 m west of Watkins Island and 223 m east of Belding Island. British mapping in 1976.

• British Antarctic Territory. Scale 1:200000 topographic map. DOS 610 Series, Sheet W 66 66. Directorate of Overseas Surveys, UK, 1976
• Antarctic Digital Database (ADD). Scale 1:250000 topographic map of Antarctica. Scientific Committee on Antarctic Research (SCAR). Since 1993, regularly upgraded and updated

• List of Antarctic and subantarctic islands

• Bulgarian Antarctic Gazetteer. Antarctic Place-names Commission. (details in Bulgarian, basic data in English)

• Luna Island. Adjusted Copernix satellite image

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