Ortaca is a village in Gerede District, in Bolu Province, Türkiye. Ortaca lies at 1,532 m above sea level, in the Köroğlu mountains. It has 195 inhabitants. The nearest city is Gerede, 20 km to the west. Among the landmarks around are Hadrianopolis in Paphlagonia (17.4 km) and Akyar Dam (25 km).