Sinanoğlu is a neighborhood in Ferizli District, in Sakarya Province, Türkiye. Sinanoğlu lies 5.2 km from the Akçakoca Dağları mountains. It has 2,297 inhabitants (2022). The nearest city is Ferizli, 5.9 km to the southwest. Among the landmarks around are Sangarius Bridge (30 km), SM UC-13 (20 km) and Seyifler Castle (3.8 km).