The Bạch Đằng River (Vietnamese: Sông Bạch Đằng, IPA: [ʂoŋ ɓâjk̟ ɗɐ̀ŋ]), also called Bạch Đằng Giang (from 白藤江, IPA: [ɓâjk̟ ɗɐ̀ŋ ʑaːŋ]), the White Wisteria River, is a river in northern Vietnam, located near Hạ Long Bay. It flows through Yên Hưng District of Quảng Ninh province and the district Thủy Nguyên of Haiphong.
It is the best river way to access Hanoi from the south of China, through the Nam Triệu Mouth, the Kinh Thầy River, the Đuống River, and then the Red River to Hanoi.