| El Guayabo | |
| Pushpin Map: | El Salvador |
| Pushpin Map Caption: | Location of mouth |
| Source1 Location: | El Playón, Tecoluca, San Vicente |
| Source1 Coordinates: | 13.3167°N -88.7833°W |
| Mouth Location: | Lempa River, El Playón, Tecoluca, San Vicente |
| Mouth Coordinates: | 13.2666°N -88.8337°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | El Salvador |
| Subdivision Type2: | Department |
| Subdivision Name2: | San Vicente |
El Guayabo River (Rio El Guayabo) is a medium stream in El Salvador, with a moderate to large flow of fresh water year-round, especially from early May through October.[1]