| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Sociedad | city | Departamento de Morazan | El Salvador | 13.7 | -88.0166667 | 1204 | 21007 |
| Socorro | city | Departamento de La Union | El Salvador | 13.4741667 | -88.0169444 | 711 | 19944 |
| Soledad | city | Departamento de Cuscatlan | El Salvador | 13.7666667 | -88.8833333 | 2532 | 66890 |
| Soledad | city | Departamento de Morazan | El Salvador | 13.8666667 | -88.1666667 | 1318 | 20856 |
| Soledad Las Flores | city | Departamento de La Paz | El Salvador | 13.6333333 | -88.9833333 | 2050 | 46129 |
| Soledad Terrero | city | Departamento de San Miguel | El Salvador | 13.9 | -88.3333333 | 1200 | 18225 |
| Soliman | city | Departamento de Santa Ana | El Salvador | 13.95 | -89.4394444 | 2185 | 42729 |
| Solimar | city | Departamento de Santa Ana | El Salvador | 13.95 | -89.4394444 | 2185 | 42729 |
| Solimán | city | Departamento de Santa Ana | El Salvador | 13.95 | -89.4394444 | 2185 | 42729 |
| Sombrerito | city | Departamento de La Union | El Salvador | 13.5263889 | -87.8913889 | 180 | 13932 |
| Sonsonate | city | Departamento de Sonsonate | El Salvador | 13.7188889 | -89.7241667 | 810 | 155620 |
| Sonzacate | city | Departamento de Sonsonate | El Salvador | 13.7341667 | -89.7147222 | 823 | 155620 |
| Soyapango | city | Departamento de San Salvador | El Salvador | 13.7347222 | -89.1513889 | 1971 | 699924 |
| Soyopango | city | Departamento de San Salvador | El Salvador | 13.7347222 | -89.1513889 | 1971 | 699924 |