格伊尼克是土耳其的城镇，由博卢省负责管辖，位于该国西北部，距离首府博卢98公里，面积1,436平方公里，主要经济活动有农业和畜牧业，2011年人口3,901。

For the village in Azerbaijan, see Göynük, Azerbaijan.

Göynük is a town and a district of Bolu Province in the Black Sea region of Turkey. It covers an area of 1,436 km², and the population (2000) is 18,589 of which 4,894 live in the town of Göynük. The mayor is Kemal Kazan (AKP). Its neighbours are Mudurnu from north-east, Nallıhan from south-east, Sarıcakaya from south, Yenipazar from south-west, Taraklı from west and Akyazı from north-west.