Agios Kirykos is a town and former municipality located on the island of Ikaria in the North Aegean region of Greece. Following the 2011 local government reform, it became a municipal unit within the larger municipality of Ikaria.
The town serves as the administrative capital for both the municipality of Ikaria and the Ikaria regional unit. As of the 2021 census, Agios Kirykos had a population of 3,565 residents and covers a land area of 74.7 square kilometres.