Bahtıllı is a village in Simav District, in Kütahya Province, Türkiye. Bahtıllı lies at 650 m above sea level, 1.2 km from the Simav Dağları mountains. It has 533 inhabitants. The nearest city is Simav, 17.1 km to the east. Among the landmarks around are Ancyra (4.7 km).