The Mekong River is a major river in Southeast Asia, running through China, Myanmar, Laos, Thailand, Cambodia, and Vietnam. It is the 12th longest river in the world and the 7th longest in Asia. It is also the largest river in Southeast Asia, with a total length of 4, 350 km (2, 703 mi). The Mekong River is an important source of water for the people living in the region, providing irrigation, transportation, and fishing opportunities. The Mekong Delta, located at the mouth of the river in Vietnam, is one of the most productive agricultural regions in the world.