Ba Đồn is a town (thị xã) in Quảng Bình Province, Vietnam. The town is equal to a huyện and is located on National Route 1, about 40 km north of the provincial capital, Đồng Hới. The township is the commercial and service centre serving surrounding rural areas. Ba Đồn was incorporated into a 3rd municipality (town or thị xã) including some neighboring communes of Quảng Trạch District on December 20, 2013.