Bozüyük District is a district of Bilecik Province of Turkey. Its seat is the city Bozüyük. Its area is 860 km2, and its population is 78,010 (2021). The district borders İnegöl to the west, Pazaryeri to the northwest, Bilecik to the north, Söğüt to the northeast, Tepebaşı (Eskişehir) to the east, İnönü to the southeast, Kütahya and Tavşanlı to the south and Domaniç to the southwest.