| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| San Agustin | city | San Juan | Argentina | -30.63 | -67.47 | 2778 | 3498 |
| San Agustin de Valle Fertil | city | San Juan | Argentina | -30.63 | -67.47 | 2778 | 3498 |
| San Chose de Chačalis | city | San Juan | Argentina | -30.24 | -68.75 | 4189 | 9020 |
| San Isidro | city | San Juan | Argentina | -31.49 | -68.33 | 2004 | 3767 |
| San José de Jáchal | city | San Juan | Argentina | -30.24 | -68.75 | 4189 | 9020 |
| San Juan | city | San Juan | Argentina | -31.54 | -68.54 | 2509 | 187938 |
| San Juan de la Frontera | city | San Juan | Argentina | -31.54 | -68.54 | 2509 | 187938 |
| San Martín | city | San Juan | Argentina | -31.43 | -68.50 | 2063 | 42688 |
| San Roque | city | San Juan | Argentina | -30.28 | -68.71 | 3582 | 5252 |
| Sanchez de Loria | city | San Juan | Argentina | -31.62 | -68.53 | 2037 | 62092 |
| Sanctus Ioannes a Cuio | city | San Juan | Argentina | -31.54 | -68.54 | 2509 | 187938 |
| Santa Lucía | city | San Juan | Argentina | -31.54 | -68.50 | 2030 | 171557 |
| Santa Rosa | city | San Juan | Argentina | -30.75 | -67.45 | 4248 | 0 |
| Santo Domingo | city | San Juan | Argentina | -31.30 | -67.32 | 2509 | 0 |
| Sapitos | city | San Juan | Argentina | -29.02 | -69.20 | 10180 | 0 |
| Sopenos | city | San Juan | Argentina | -29.70 | -69.33 | 11748 | 0 |
| Sorocayense | city | San Juan | Argentina | -31.56 | -69.44 | 5869 | 4 |