St. Cyricus Island (Bulgarian: остров св. Кирик, ostrov sv. Kirik), also known as St. Cyril Island or Sts. Quiricus and Julietta Island is a Bulgarian island in the Black Sea, situated 150 metres from Sozopol's Stolets peninsula. It has an area of about 0,08 square kilometres and a height of 15 metres. The island is connected to the continent by means of a road and a breakwater.