Calogeros the Anchorite (Ancient Greek: Καλόγερος ὁ Αναχωρητής, romanized: Kalogeros ho Anakhorētēs, Kalogeros o Anakhoritis, Latin: Calogerus or Calocerus, Sicilian: Calòjiru and Caloriu, Italian: Calogero, also known as Calogerus the Hermit and Calogerus of Sicily, Chalcedon c. 466 – 18 June, 561, Monte Kronio) was a hermetical monk, venerated as a saint by the Catholic and Orthodox churches, and the patron of many places in Sicily.

Calogerus is commemorated by the Orthodox Church on June 18, together with the bishop Gregorius and the deacon Demetrius.

The three saints are noted as opponents of Arianism who fled from Africa to Sicily to escape persecution.

Other centres in which Saint Calogero is particularly venerated are Porto Empedocle, Naro, Sciacca, Frazzanó, San Salvatore di Fitalia, Cesaró, Petralia Sottana and Campofranco.

In iconography, he is usually identifiable as a bearded hermit with olive complexion wearing eastern (Syriac) hooded vestments.