Yeniçağa is a town located in the Bolu Province within the Black Sea region of Turkey. It serves as the administrative seat of the Yeniçağa District and is situated at an elevation of approximately 1,200 meters above sea level.
The town is positioned about 38 kilometers from the city of Bolu along the Otoyol 4 highway, which connects Istanbul to Ankara. As of 2021, the population of Yeniçağa was recorded at 4,625 residents.