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 2019 the district had a population of 188,375. The district covers 2,123 km2 (820 sq mi).

Quảng Bình is a southern coastal province in the North Central Coast region, the Central of Vietnam. It borders Hà Tĩnh to the north, Quảng Trị to the south, Khammouane of Laos to the west and the East Sea to the east.