St. Brigid Island (Bulgarian: остров Св. Бригита, romanized: ostrov Sv. Brigita, IPA: [ˈɔstrof svɛˈta briˈɡitɐ]) is the ice-covered island 2.7 km long in southwest–northeast direction and 1.4 km wide, largest in the Barcroft group of Biscoe Islands. Its surface area is 222 ha.^[1]

It is named after St. Brigid of Kildare (c. 451–525), the patron saint of scholars.^[1]

St. Brigid Island is located at 66°25′06″S 67°07′35″W / 66.41833°S 67.12639°W / -66.41833; -67.12639, which is 1.28 km south of Watkins Island, 1.18 km west of Irving Island, 3.9 km north of Bedford Island and 3 km southeast of Belding Island, based on 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

• St. Brigid Island. SCAR Composite Gazetteer of Antarctica
• Bulgarian Antarctic Gazetteer. Antarctic Place-names Commission. (details in Bulgarian, basic data in English)

• St. Brigid Island. Adjusted Copernix satellite image

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