Bayırköy is a town (belde) and municipality in the Bilecik District, Bilecik Province, Turkey.Belde , Turkey Civil Administration Departments Inventory. Retrieved 30 January 2023. Its population is 1,793 (2021). It is about north of Bilecik. Bayırköy consists of the quarters Fatih, Gazi and Sarmaşık.Mahalle , Turkey Civil Administration Departments Inventory. Retrieved 30 January 2023.
The town has been relocated in 1948 to its present location after a landslide in its former location slightly at the west. The economy of the town depends on vegetable farming and sericulture. There are also some factories around the town.Mayor's page
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