Dinar (Ancient Greek: Κελαιναί-Ἀπάμεια, romanized: KelainaÃ-Apámeia,) is a town of Afyonkarahisar Province in the Aegean region of Turkey, 106 km from the city of Afyon. It is the seat of Dinar District. Its population is 26,300 (2021). The mayor was Saffet Acar (MHP) between 2019 and 2024. Veysel Topçu of CHP became the mayor of the town in the local election held on 31 March 2024.
The town is built amidst the ruins of Celaenae-Apamea, near the sources of the Büyük Menderes (Maeander) river. In ancient mythology this was the site of the musical duel between Apollo and Marsyas.