Gölcük is the location of one of the Turkish Navy's main naval bases, and of a Ford Otosan automobile plant.

It would be more appropriate to start the historical development of Gölcük with the region that the Ancient Greeks and Romans called Bithynia, which also includes Izmit and its surroundings.

The technical need that emerged with the decision to repair the battleship Yavuz, which was damaged in 1925, led to the establishment of a military shipyard in Gölcük.

[citation needed] The population of the city of Gölcük started to increase rapidly with the workers and their families coming from the Istanbul shipyards to work in the workshops established for the repair of the battleship Yavuz.

The Government Mansion, whose construction was completed in a short time, was passed in 1938 and the State organization was settled in Gölcük.

[citation needed] Due to the government's arrival in Gölcük, the District and Population Organization and the Police Department were established in Değirmendere.

[citation needed] The Municipality Organization was established in İhsaniye village with the decision of the Council of Ministers dated 06.09.1966 and numbered 4636.