Ulus is a neighborhood in Gebze District, in Kocaeli Province, Türkiye. Ulus lies 14.8 km from the Akçakoca Dağları mountains. It has 15,495 inhabitants (2022). The nearest city is Köşklü Çeşme, 1.8 km to the southeast. Among the landmarks around are Hagia Sophia (41 km), Blue Mosque (42 km) and Helenopolis (13.2 km).