Gölcük Population 2026
Gölcük has a population of 56,189, making it the #168 biggest city in 🇹🇷 Türkiye, located in Kocaeli. Roughly 0.1% of Türkiye's population lives here. It is about 279× smaller than Istanbul, the country's biggest city.
Population (city proper)
56,189
Rank in Türkiye
#168
Coordinates
40.72°N, 29.82°E
~56 m elevation · Europe/Istanbul
Distance to capital (Ankara)
272 km
169 miles, straight line
Other big cities in Kocaeli
Cities near Gölcük
FAQ
What is the population of Gölcük?
Gölcük has a population of 56,189 (city proper, latest official figure via GeoNames), making it the #168 biggest city in Türkiye.
What region is Gölcük in?
Gölcük is located in Kocaeli, Türkiye.
Is Gölcük the capital of Türkiye?
No, the capital of Türkiye is Ankara, about 272 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.
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