Đồng Hới is the capital city of Quảng Bình province in the north central coast of Vietnam. The city's area is 155.71 km (60.12 sq mi), population as per the 2009 census: 108,526. Urban area is 55.47 km², urban population was 71,620; Suburban area is 100.24 square kilometers, suburban population was 36,906. The city is served by National Highway 1A and the local railway station and airport. By road, Đồng Hới is 486 kilometers (302 mi) south of Hanoi, 195 kilometers (121 mi) south of Vinh, 172 kilometers (107 mi) north of Huế and 1,238 kilometers (769 mi) north of Hồ Chí Minh City. It borders Quảng Ninh District on the west and south, the South China Sea on the east, Bố Trạch District on the north.
Đồng Hới has a 12-km-long coastline with white sand beaches. Đồng Hới is the closest city to Phong Nha-Kẻ Bàng National Park, UNESCO's World Natural Heritage Site located 50 km north of the city