Bolu Province is a province situated in north-western Turkey. It is located between the capital, Ankara and the largest city in the country, Istanbul. It covers an area of 7,410 km2, and the population is 311,810.
The capital city of the province is Bolu.
The city has been governed by mayor Tanju Özcan (CHP) since local elections in 2019. It was the site of Ancient Claudiopolis and has also been called Eskihisar (“old fortress”) (and as such has several Turkish namesakes).
Bolu is on the old highway from Istanbul to Ankara, which climbs over Mount Bolu, while the new motorway passes through Mount Bolu Tunnel below the town.