Biberoğlu is a neighborhood in İzmit District, in Kocaeli Province, Türkiye. Biberoğlu lies 1.0 km from the Akçakoca Dağları mountains. It has 131 inhabitants (2022). The nearest city is Yahyakaptan, 10.6 km to the west. Among the landmarks around are Nicomedia (15.3 km), Sangarius Bridge (25 km) and Astacus (17.0 km).