Agios Kirykos (Greek: Άγιος Κήρυκος) is a town and a former municipality on the island of Ikaria, North Aegean, Greece.

It was named after Saint Kirykos or Quiricus, the youngest martyr of the Eastern Orthodox Church, who suffered death at the age of three in Asia Minor.

Agios Kirykos hosts the annual International Chess Tournament, "Ikaros", every July.

Points of interest include the old school, the archaeological museum, the traditional square, the brass band performing at feast days since 1928, the stadium in Patela, which hosted the 10th Pan-Aegean Games, the statue of Skepsi (thinking woman), the altar of the flame for the Aerathletic international IKARIADA Games and the Lefkada Annunciation medieval monastery.

The Archaeological Museum of Agios Kirykos houses various relics from an ancient tower outpost on a nearby mountain.

Made of massive tetrapods, this structure was installed to protect the town from the infamous waves during winter.