Eleutherna (Greek: Ἐλεύθερνα), also called Apollonia (Greek: Ἀπολλωνία), was an ancient city-state in Crete, Greece, which lies 25 km southeast of Rethymno in Rethymno regional unit. Archaeologists excavated the site, located on a narrow northern spur of Mount Ida, the highest mountain in Crete. The site is about 1 km south of modern town of Eleftherna, about 8 km north east of Moni Arkadiou, in the current municipality of Rethymno.