The Mekong Delta, also known as the Western Region or South-western region, is the region in southwestern Vietnam where the Mekong River approaches and empties into the sea through a network of distributaries. The Mekong delta region encompasses a large portion of south-western Vietnam of over 40,500 km2 (15,600 sq mi). The size of the area covered by water depends on the season. Its wet coastal geography makes it an important source of agriculture and aquaculture for the country.

The Khmer people are an Austroasiatic ethnic group native to Cambodia. They comprise over 95% of Cambodia's population of 17 million.They speak the Khmer language, which is part of the larger Austroasiatic-language family alongside Mon and Vietnamese.