Köseköy is located in Turkey (Kocaeli) and time zone Europe/Istanbul.
Places nearby are Kullar, Yuvacık and İzmit.
Istanbul is 90 km away, Bursa is 96 km away and Ankara is 245 km away as the crow flies.
Distances from Köseköy to the most important cities in Turkey and the world.
40.7401200°
30.0055600°