Gölcük, Kocaeli
Gölcük is a town and district of Kocaeli Province in the Marmara region of Turkey. The town is located at the northern gulf of Armutlu Peninsula on the coast of Marmara Sea and south of the province.
It is the district, where the 1999 earthquake disaster happened. Gölcük is the location of one of the Turkish Navy's main naval bases. Also, Ford Otosan automobile plant is located in Gölcük. The mayor is Mehmet Ellibeş.