Tonlé San
| Tonlé San | |
|---|---|
 Map of Cambodia with Tonlé San river marked | |
| Native name | Sông Sê San |
| Other name | Ya Krong Po Ko |
| Origin |
confluence of Dak Psi and Dak Po Ko 14°36′23″N 107°50′25″E / 14.6063°N 107.8404°E |
| Mouth |
Mekong 13°32′10″N 105°57′54″E / 13.536°N 105.965°ECoordinates: 13°32′10″N 105°57′54″E / 13.536°N 105.965°E |
| Progression | Tonlé San—Mekong—Mekong Delta—South China Sea |
| Basin countries | Vietnam, Cambodia |
| Basin area | 17,000 km2 (6,600 sq mi) |
Not to be confused with Tonlé Sap (lake).
Tonlé San, also known as Tonlé Se San or Sesan River, is a river that flows through central Vietnam and northeast Cambodia. It is a major tributary of the Mekong River. A short portion of the river forms a part of the international border between Cambodia and Vietnam.
Women in Sesan district are washing their clothes in Tonle Sesan, the major tributary of the Mekong River that flows through Cambodia.