The Tiền River ( 瀧前 or 前江) is the name given to the section of the Mekong’s mainstream in Vietnam.Ngo The Vinh Mekong-The Occluding River: The Tale of a River - 2010 "The first bridge of its kind, the Mỹ Thuận Bridge strides the Tiên River with a span measuring 1,535 meters. Built in 2000, it connects the two provinces of Vinh Long and Tiên Giang. The expected time for completion of the Cân Tho Bridge was set ..."

At Phnom Penh, the Bassac River branches off from Mekong River. Both Mekong and the distributary Bassac then flow towards the Cambodia–Vietnam border. After entering Vietnam, Mekong is known as the Tiền River (or Fleuve Antérieur in French, meaning "prior river") while Bassac is known as the Hậu River (/ or , meaning "posterior river").Judith Ehlert Beautiful Floods: Environmental Knowledge and Agrarian Change in ... 2012 Page 19 "Coming from Cambodia and crossing the Vietnamese border at Tan Chau and Chau Doc, in the northwest of the Mekong Delta, the Mekong River splits into major branches known as the sông Tiền ('Tien River') and sông Hậu ('Hau River')."

In Vietnam, distributaries of the Tiền River include the Cổ Chiên River, the Hàm Luông River, the Ba Lai River and the Mỹ Tho River.

References