Hai Lang district is the southernmost of the province, which is 20 kilometers away from of Dong Ha city to the north and 40 kilometers away from the city of Hue, Thua Thien - Hue to the south, East side is neiborghing to the east china sea, bordered by Dakrong on the west and Thua Thien Hue province on the south; the north side is adjoining Quang Tri town and Trieu Phong district. 

Hai Lang has 19 communes and 01 towns with a total natural area of 42692.53 hectares . Its population is 86,223 people (among which the urban population was 2,865 people, the rural ones is 83,360 peoples). Being a land splitted  by specific and complex terrain, including mountains, plains and coastal areas; wrapped and enriched by two great rivers which are  mentioned on pages of historical poetry, that is the O Lau – the poetic river and Vinh Dinh picturesque winding river , as the vascular energy and motivation to develop for Hai Lang resident and land.

During the Viet Nam war, Hai Lang is one of the cutthroat battle. Over 20 years of construction and development, Hai Lang has achieved significant results in many areas, which has contributed to the existing change of the town’s image.