| Pushpin Map: | El Salvador |
| Pushpin Map Caption: | Location of mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | El Salvador, Honduras |
| Mouth Coordinates: | 13.9837°N -88.7828°W |
The Sumpul River (Spanish; Castilian: río Sumpul) is a river in north-western El Salvador on the border with Honduras. It flows through the Chalatenango Department.[1]
On 14 May 1980, the river and the nearby village of Las Aradas were the site of a massacre by the Salvadoran Armed Forces that left between 300 and 600 people dead.