Bozüyük is a city located in the Marmara region of Turkey. It serves as the seat of the Bozüyük District within Bilecik Province. The city is situated approximately 32 km from Bilecik and 45 km from Eskişehir, maintaining an economic dependence on the latter city.
As of 2021, Bozüyük has a population of 71,806, making it the second most populous municipality in Bilecik Province after the provincial capital. The urban area is organized into ten distinct quarters: Çarşı, Kasımpaşa, Tekke, Yeni, Yediler, 4 Eylül, Yeşilkent, Içköy, Akpınar, and Yenidoğan.