Bố Trạch is a rural district in Quảng Bình Province. The district capital is Hoàn Lão township. Bố Trạch borders the capital city of Đồng Hới to the south-east, Tuyên Hóa District and Quảng Trạch District to the north, Quảng Ninh District to the south and Minh Hóa District to the north-west. Bố Trạch is home to Phong Nha-Kẻ Bàng National Park and has 30 communes and townships. As of 2017 the district had a population of 184,371. The district covers 2,123 km².