The Kong River, also known as the Xe Kong or the Se Kong (Lao: ເຊກອງ Se Kong, (Khmer:សេកុង(official) or ស្រែគង្គ(Khmerization)), Vietnamese: sông Sê Kông) is a river in Southeast Asia. The river originates in Thừa Thiên–Huế Province in Central Vietnam and flows 480km (300miles) through southern Laos and eastern Cambodia. It joins the Mekong River near Stung Treng town of Cambodia. Part of its course forms the international boundary between Laos and Cambodia.