Kırkbaş is a village in Yalvaç District, in Isparta Province, Türkiye. Kırkbaş lies at 1,168 m above sea level, 0.8 km from the Karakuş Dağları mountains. It has 459 inhabitants. The nearest city is Yalvaç, 17.2 km to the southeast. Among the landmarks around are Antioch of Pisidia (17.6 km), Sücüllü Dam (11.0 km) and Yalvaç Müzesi (17.1 km).