Bayındır is a district of İzmir Province of Turkey and the central town of the district which is situated in the valley of the Küçük Menderes. Its name in antiquity was Caystrus. Its present name derives from the first Turkish settlers in the region who were members of the Bayındır clan, one of the 24 original Oghuz clans. In 1997, the town population was 18,100.