Phellus is an town of ancient Lycia, now situated on the mountainous outskirts of the small town of Kaş in the Antalya Province of Turkey. The city was first referenced as early as 7 BC by Greek geographer and philosopher Strabo in Book XII of his Geographica (which detailed settlements in the Anatolia region), alongside the port town of Antiphellus; which served as the settlement's main trade front.
Its exact location, particularly in regard to Antiphellus, was misinterpreted for many years. Strabo incorrectly designates both settlements as inland towns, closer to each other than is actually evident today. Additionally, upon its rediscovery in 1840 by Sir Charles Fellows, the settlement was located near the village of Saaret, west-northwest of Antiphellus. Verifying research into its location in ancient text proved difficult for Fellows, with illegible Greek inscriptions providing the sole written source at the site. However, Thomas Abel Brimage Spratt details in his 1847 work Travels in Lycia that validation is provided in the words of Pliny the Elder, who places Phellus north of Habessus (Antiphellus' pre-Hellenic name).