| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Samana | city | Sucumbios | Ecuador | 0.12 | -76.98 | 1669 | 2922 |
| San Antonio | city | Sucumbios | Ecuador | -0.30 | -76.65 | 902 | 3993 |
| San Isidro | city | Sucumbios | Ecuador | 0.16 | -76.85 | 1220 | 10915 |
| San Jacinto | city | Sucumbios | Ecuador | 0.05 | -76.56 | 1056 | 2322 |
| San Jose | city | Sucumbios | Ecuador | 0.08 | -76.93 | 1669 | 12488 |
| San Jose de Bella Flor-La Punta | city | Sucumbios | Ecuador | 0.26 | -76.88 | 1669 | 1972 |
| San Jose de Los Angeles | city | Sucumbios | Ecuador | 0.08 | -76.66 | 1095 | 3261 |
| San José de Bella Flor | city | Sucumbios | Ecuador | 0.23 | -76.92 | 1669 | 4714 |
| San José del Aguarico | city | Sucumbios | Ecuador | 0.06 | -77.26 | 1811 | 968 |
| San Lorenzo | city | Sucumbios | Ecuador | 0.19 | -76.88 | 1669 | 6281 |
| San Miguel de Sucumbíos | city | Sucumbios | Ecuador | 0.38 | -77.13 | 1814 | 5334 |
| San Pablo de Kantesiya | city | Sucumbios | Ecuador | -0.25 | -76.43 | 875 | 331 |
| San Pedro de Los Cofanes | city | Sucumbios | Ecuador | 0.19 | -77.49 | 2680 | 191 |
| San Pedro de los Cofanes | city | Sucumbios | Ecuador | -0.14 | -76.85 | 987 | 4624 |
| San Vicente | city | Sucumbios | Ecuador | 0.13 | -76.88 | 1669 | 20118 |
| San Vicente | city | Sucumbios | Ecuador | 0.04 | -76.58 | 1046 | 2465 |
| San Vincente | city | Sucumbios | Ecuador | 0.13 | -76.88 | 1669 | 20118 |
| Sansahuari | city | Sucumbios | Ecuador | 0.15 | -76.14 | 862 | 149 |
| Santa Bárbara | city | Sucumbios | Ecuador | 0.65 | -77.52 | 8733 | 3397 |
| Santa Bárbara | city | Sucumbios | Ecuador | 0.38 | -77.13 | 1814 | 5334 |
| Santa Cecilia | city | Sucumbios | Ecuador | 0.08 | -76.99 | 1669 | 2536 |
| Santa Cecilla | city | Sucumbios | Ecuador | 0.08 | -76.99 | 1669 | 2536 |
| Santa Cruz | city | Sucumbios | Ecuador | 0.12 | -76.86 | 1669 | 21594 |
| Santa Elena | city | Sucumbios | Ecuador | 0.37 | -76.19 | 987 | 372 |
| Santa Rosa | city | Sucumbios | Ecuador | 0.10 | -76.86 | 1669 | 29189 |
| Santa Rosa Sucumbios | city | Sucumbios | Ecuador | 0.38 | -77.13 | 1814 | 5334 |
| Santa Rosa de Sucumbio | city | Sucumbios | Ecuador | 0.38 | -77.13 | 1814 | 5334 |
| Santa Rosa de Sucumbios | city | Sucumbios | Ecuador | 0.25 | -76.42 | 1000 | 715 |
| Santa Rosa de Sucumbios | city | Sucumbios | Ecuador | 0.38 | -77.13 | 1814 | 5334 |
| Sebundoy | city | Sucumbios | Ecuador | 0.50 | -77.50 | 5029 | 2122 |
| Secoya | city | Sucumbios | Ecuador | 0.05 | -76.61 | 1053 | 2553 |
| Selvayacu | city | Sucumbios | Ecuador | 0.09 | -76.02 | 830 | 149 |
| Sevilla | city | Sucumbios | Ecuador | 0.09 | -77.13 | 1699 | 3602 |
| Shiris | city | Sucumbios | Ecuador | 0.05 | -77.21 | 1742 | 1185 |
| Shuara | city | Sucumbios | Ecuador | 0.03 | -76.58 | 1040 | 2445 |
| Shushufindi | city | Sucumbios | Ecuador | -0.19 | -76.65 | 902 | 8687 |
| Shushufindi | city | Sucumbios | Ecuador | -0.29 | -76.41 | 862 | 230 |
| Shushufindi | city | Sucumbios | Ecuador | -0.03 | -77.14 | 1683 | 750 |
| Shushupindi | city | Sucumbios | Ecuador | -0.29 | -76.41 | 862 | 230 |
| Shushuquí | city | Sucumbios | Ecuador | 0.10 | -76.60 | 1072 | 1375 |
| Sigue Nuevo | city | Sucumbios | Ecuador | 0.21 | -76.24 | 889 | 132 |
| Sigüe | city | Sucumbios | Ecuador | 0.21 | -76.24 | 889 | 132 |
| Sinangue | city | Sucumbios | Ecuador | 0.12 | -77.43 | 2509 | 684 |
| Susufinde | city | Sucumbios | Ecuador | -0.03 | -77.14 | 1683 | 750 |