| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Sajinos | city | Tumbes | Peru | -4.01 | -80.83 | 830 | 1340 |
| Salado Chiquito | city | Tumbes | Peru | -3.96 | -80.81 | 830 | 1341 |
| Salado Grande | city | Tumbes | Peru | -3.95 | -80.81 | 830 | 1341 |
| Saldarriaga | city | Tumbes | Peru | -3.54 | -80.44 | 3 | 32519 |
| Samorondon | city | Tumbes | Peru | -4.14 | -80.78 | 1200 | 284 |
| San Francisco | city | Tumbes | Peru | -3.98 | -80.40 | 830 | 35635 |
| San Isidro | city | Tumbes | Peru | -3.62 | -80.52 | 203 | 17746 |
| San Jacinto | city | Tumbes | Peru | -3.60 | -80.52 | 108 | 13762 |
| San Jacinto | city | Tumbes | Peru | -3.64 | -80.45 | 98 | 4996 |
| San Jacinto | city | Tumbes | Peru | -3.55 | -80.48 | 6 | 18805 |
| San José | city | Tumbes | Peru | -3.63 | -80.56 | 321 | 17075 |
| San José | city | Tumbes | Peru | -3.56 | -80.46 | 16 | 15540 |
| San Juan | city | Tumbes | Peru | -3.63 | -80.43 | 91 | 9134 |
| San Juan de la Virgen | city | Tumbes | Peru | -3.63 | -80.43 | 91 | 9134 |
| San Juan de los Virgenes | city | Tumbes | Peru | -3.63 | -80.43 | 91 | 9134 |
| San Marcos | city | Tumbes | Peru | -3.89 | -80.60 | 830 | 508 |
| San Miguel | city | Tumbes | Peru | -3.88 | -80.62 | 830 | 1128 |
| San Miguel | city | Tumbes | Peru | -4.18 | -80.88 | 830 | 1146 |
| San Pedro de los Incas | city | Tumbes | Peru | -3.60 | -80.48 | 85 | 8748 |
| Santa Maria | city | Tumbes | Peru | -3.68 | -80.44 | 180 | 2877 |
| Santa Rosa | city | Tumbes | Peru | -3.66 | -80.45 | 121 | 5073 |
| Sapotito | city | Tumbes | Peru | -4.06 | -80.85 | 830 | 1149 |
| Sechurita | city | Tumbes | Peru | -3.68 | -80.68 | 177 | 1037 |
| Serrano | city | Tumbes | Peru | -3.83 | -80.68 | 272 | 1078 |
| Suarez | city | Tumbes | Peru | -3.81 | -80.69 | 308 | 1196 |
| Suárez | city | Tumbes | Peru | -3.80 | -80.70 | 252 | 1284 |