Agios Kirykos is the capital and main port of Ikaria, an island in the northeastern Aegean Sea. It is located on the southeastern coast of the island and serves as its main administrative and economic center.

The town is built amphitheatrically around the harbor, with houses and streets following the natural terrain. It offers services, shops, and infrastructure for both residents and visitors.

Agios Kirykos is also associated with the relaxed atmosphere of Ikaria as a whole, known for its unique lifestyle, as well as access to nearby beaches and thermal springs.