| Official Name: | San Carlos Sud |
| Pushpin Map: | Argentina |
| Pushpin Mapsize: | 200 |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Argentina |
| Coordinates: | -31.7573°N -61.1004°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | Department |
| Subdivision Name1: | Santa Fe |
| Subdivision Name2: | Las Colonias |
| Established Title: | Founded |
| Established Date: | 1858 |
| Population Total: | 2,102 |
| Elevation M: | 37 |
| Area Code: | 03404 |
| Postal Code: | S 3017 |
| Postal Code Type: | CPA Base |
| Leader Title: | Communal president |
| Leader Name: | Florencia Primo |
San Carlos Sud (also known as San Carlos Sur) is a town in the Las Colonias Department of Santa Fe Province, Argentina.[1] [2] [3]