Gölcük is located in Turkey (Kocaeli) and time zone Europe/Istanbul.
Places nearby are İhsaniye, Derince and Körfez.
Istanbul is 77 km away, Bursa is 83 km away and Ankara is 258 km away as the crow flies.
Distances from Gölcük to the most important cities in Turkey and the world.
40.7150100°
29.8182400°
District and municipality in Kocaeli, Turkey
https://en.wikipedia.org/wiki/Gölcük,_Kocaeli