| Río Grande de San Miguel | |
| Pushpin Map: | El Salvador |
| Pushpin Map Caption: | Location of mouth |
| Subdivision Type1: | Country |
| Subdivision Name1: | El Salvador |
| Subdivision Type2: | Department |
| Subdivision Name2: | Usulután |
| Mouth Location: | Pacific Ocean |
Río Grande de San Miguel is a river in southern El Salvador, Central America.[1] [2]
It flows into the Pacific Ocean in the Usulután Department, at .