Ertuğrulköy is a village in Gerede District, in Bolu Province, Türkiye. Ertuğrulköy lies at 1,281 m above sea level, 0.1 km from the Köroğlu mountains. It has 113 inhabitants. The nearest city is Gerede, 16.0 km to the west. Among the landmarks around are Hadrianopolis in Paphlagonia (17.8 km).
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