Karacasu is a town (belde) in the Bolu District, Bolu Province, Turkey.Belde Belediyesi , Turkey Civil Administration Departments Inventory. Retrieved 30 January 2023. As of 2021, it had a population of 2,197 people. It is situated far from Bolu to the north of Köroğlu Mountains. The town's economy depends on thermal springs.
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