Duzce is just situated between Ankara and Istanbul; Ankara is 240 km away to the East and Istanbul is 228 km away to the West. The road of D-100 passes through Duzce and TEM Highway passes around it.
Duzce is placed into the plateau of The West Blacksea coast. The city is surrounded to the West by Sakarya, to the Northeast by Zonguldak and to the East by Bolu. The distance from East to West is 23 km and from North to South is 20 km. It opens to the Black sea with the valley of Buyuk Melen on the Northwest. Nearby are also some tourist centers and popular attractions such as Abant, Kartalkaya, Yedigoller, Golcuk and Akcakoca.