| Settlement Type: | Town |
| Official Name: | San Carlos de Bolívar |
| Pushpin Map: | Argentina |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Argentina |
| Pushpin Mapsize: | 200 |
| Pushpin Mapsize1: | 200 |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Name1: | Buenos Aires |
| Subdivision Type2: | Partido |
| Subdivision Name2: | Bolívar |
| Established Title: | Founded |
| Established Date: | 2 March 1878 |
| Population Total: | 26242 |
| Coordinates: | -36.25°N -67°W |
| Elevation M: | 102 |
| Blank Name: | Climate |
| Blank Info: | Cfa |
| Postal Code Type: | CPA Base |
| Postal Code: | B 6550 |
| Area Code: | +54 2314 |
San Carlos de Bolívar (or simply Bolívar) is a town in Buenos Aires Province, Argentina. It is the administrative centre for Bolívar Partido.
The Instituto Nacional de Tecnología Agropecuaria has a campus in Bolívar.
San Carlos de Bolívar is the hometown of the Club Ciudad de Bolívar, the most successful team of the Argentine volleyball league.