Söğüt District is a district of Bilecik Province of Turkey. Its seat is the town Söğüt. Its area is 523 km2, and its population is 18,352 (2021). It is in the Marmara region in the north-west of the country, bordering Bilecik to the west, Gölpazarı to the north, İnhisar to the north-east, Tepebaşı (Eskişehir) to the south-east, and Bozüyük to the south-west.