Kianida Reef (Bulgarian: риф Кианида, romanized: rif Kianida, IPA: [ˈrif kiɐˈnidɐ]) is the 350 m long in east-west direction and 140 m wide, narrowing to the east rocky reef lying in Osogovo Bay, off the southeast extremity of Rugged Island in the South Shetland Islands.

[2] The feature is named after the phantom island of Kianida or Cianeis off the Black Sea coast of Thrace, featured on a 1467 map by Nicolaus Germanus based on Claudius Ptolemy's Geography.

[1] Kianida Reef is located at 62°38′32″S 61°12′33″W / 62.64222°S 61.20917°W / -62.64222; -61.20917, which is 440 m southwest of Radev Point, 1.65 km west-southwest of Astor Island and 3.5 km north-northwest of Devils Point on Livingston Island.

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

This Livingston Island location article is a stub.