| San Buenaventura | |
| 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: | Usulután Department |
| Unit Pref: | Imperial |
| Population Total: | 21,901 |
| Population Blank1 Title: | Ethnicities |
| Timezone: | UTC-6 |
| Coordinates: | 13.5333°N -88.3833°W |
| Elevation M: | 531 |
San Buenaventura is a municipality in the Usulután department of El Salvador.
The local football club is named C.D. España and it currently plays in the Salvadoran Third Division.