Yeniçağa District is a district of the Bolu Province of Turkey. Its seat is the town of Yeniçağa.[1] Its area is 163 km2,[2] and its population is 6,838 (2021).[3] The district is on the inland side of Bolu Mountain and has a cold, hard, dry inland climate; the countryside is pine-forested on the northern and western parts of the district whereas the south-eastern parts are sparsely wooded hills.