| San Gerardo | |
| Settlement Type: | Municipality |
| Pushpin Map: | El Salvador |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in El Salvador |
| Subdivision Type: | Country |
| Subdivision Name: |  El Salvador |
| Subdivision Type1: | Department |
| Subdivision Name1: | San Miguel Department |
| Leader Title: | Governor |
| Leader Name: | Luis Quinteros |
| Unit Pref: | Imperial |
| Coordinates: | 13.8°N -112°W |
| Elevation M: | 308 |
| Official Name: | Gerardo Barrios |
San Gerardo is a municipality in the department of San Miguel, El Salvador.