| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Siano | city | Provincia de Loja | Ecuador | -3.90 | -79.97 | 2312 | 2842 |
| Sibambe | city | Provincia del Chimborazo | Ecuador | -2.20 | -78.88 | 8484 | 19470 |
| Sibimbe | city | Provincia de Los Rios | Ecuador | -1.40 | -79.38 | 1824 | 10093 |
| Sicalpa | city | Provincia del Chimborazo | Ecuador | -1.70 | -78.75 | 11148 | 46778 |
| Sicalpa | city | Provincia del Chimborazo | Ecuador | -1.70 | -78.77 | 10990 | 27177 |
| Sicsic | city | Provincia del Azuay | Ecuador | -3.05 | -78.80 | 8809 | 9731 |
| Sidcay | city | Provincia del Azuay | Ecuador | -2.83 | -78.95 | 8251 | 91280 |
| Siempreviva | city | Provincia del Guayas | Ecuador | -1.87 | -79.80 | 88 | 19405 |
| Sigchos | city | Provincia de Cotopaxi | Ecuador | -0.70 | -78.88 | 8661 | 1787 |
| Sigchoscalle | city | Provincia de Cotopaxi | Ecuador | -1.02 | -78.62 | 8818 | 27158 |
| Sigiro | city | Provincia de Loja | Ecuador | -4.03 | -79.60 | 5597 | 4197 |
| Sigsal Alto | city | Provincia de Pichincha | Ecuador | 0.05 | -78.15 | 9553 | 35468 |
| Sigsal Bajo | city | Provincia de Pichincha | Ecuador | 0.05 | -78.15 | 9553 | 35468 |
| Sigsicunga | city | Provincia de Imbabura | Ecuador | 0.25 | -78.35 | 8986 | 10142 |
| Sigsid | city | Provincia del Canar | Ecuador | -2.53 | -79.88 | 0 | 14673 |
| Sigsig | city | Provincia del Azuay | Ecuador | -3.05 | -78.80 | 8809 | 9731 |
| Sigsihuayco | city | Provincia del Canar | Ecuador | -2.55 | -78.92 | 10019 | 12309 |
| Sigsillano | city | Provincia del Azuay | Ecuador | -3.02 | -78.82 | 8041 | 11086 |
| Sigsipamba | city | Provincia del Chimborazo | Ecuador | -1.60 | -78.70 | 9773 | 27467 |
| Sigsipamba | city | Provincia de Imbabura | Ecuador | 0.32 | -77.92 | 10583 | 6298 |
| Sigsipamba | city | Provincia del Canar | Ecuador | -2.78 | -78.92 | 8582 | 21304 |
| Sigsipamba | city | Provincia de Pichincha | Ecuador | -0.23 | -78.32 | 9425 | 15949 |
| Sigsipta | city | Provincia de Pichincha | Ecuador | -0.23 | -78.32 | 9425 | 15949 |
| Sigualo | city | Provincia del Tungurahua | Ecuador | -1.27 | -78.52 | 8028 | 26996 |
| Siguenza | city | Provincia del Azuay | Ecuador | -3.33 | -79.37 | 3749 | 3788 |
| Siguitag | city | Provincia del Tungurahua | Ecuador | -1.22 | -78.73 | 11141 | 9107 |
| Sigüe | city | Provincia de Sucumbios | Ecuador | 0.23 | -76.30 | 925 | 95 |
| Sigüe Nuevo | city | Provincia de Sucumbios | Ecuador | 0.23 | -76.30 | 925 | 95 |
| Silante | city | Provincia del Canar | Ecuador | -2.52 | -78.80 | 11099 | 4126 |
| Sillería | city | Provincia de Pichincha | Ecuador | 0.17 | -78.08 | 10875 | 3297 |
| Sillunchi Chico | city | Provincia de Pichincha | Ecuador | -0.47 | -78.53 | 10524 | 19306 |
| Sillunchi Grande | city | Provincia de Pichincha | Ecuador | -0.45 | -78.53 | 10183 | 20742 |
| Simiátug | city | Provincia de Bolivar | Ecuador | -1.27 | -78.95 | 11479 | 3323 |
| Simoras | city | Provincia de Loja | Ecuador | -4.37 | -79.80 | 3093 | 3132 |
| Simón Bolívar | city | Provincia del Guayas | Ecuador | -2.18 | -80.35 | 544 | 745 |
| Simón Bolívar | city | Provincia del Guayas | Ecuador | -1.88 | -80.73 | 68 | 3762 |
| Simón Bolívar | city | Provincia del Guayas | Ecuador | -2.27 | -79.65 | 485 | 13384 |
| Simón Bolívar | city | Provincia del Guayas | Ecuador | -2.02 | -79.48 | 390 | 13599 |
| Sinangue | city | Provincia de Sucumbios | Ecuador | 0.12 | -77.43 | 2145 | 684 |
| Sinchal | city | Provincia del Guayas | Ecuador | -1.95 | -80.72 | 193 | 2962 |
| Sinchay | city | Provincia del Azuay | Ecuador | -3.18 | -79.15 | 8398 | 5835 |
| Sinche | city | Provincia de Zamora Chinchipe | Ecuador | -3.52 | -78.97 | 4852 | 208 |
| Sinchi Chicta | city | Provincia de Francisco de Orellana | Ecuador | -0.65 | -75.68 | 692 | 149 |
| Sinchic | city | Provincia de Bolivar | Ecuador | -1.53 | -78.98 | 9862 | 15656 |
| Sinchig | city | Provincia de Bolivar | Ecuador | -1.53 | -78.98 | 9862 | 15656 |
| Singuna | city | Provincia de Pichincha | Ecuador | -0.12 | -78.52 | 9393 | 444514 |
| Sinincay | city | Provincia del Azuay | Ecuador | -2.83 | -79.00 | 8572 | 109241 |
| Sipta | city | Provincia del Azuay | Ecuador | -3.05 | -78.80 | 8809 | 9731 |
| Siria | city | Provincia de Pichincha | Ecuador | -0.27 | -78.45 | 8904 | 154200 |
| Sirimbe | city | Provincia de Cotopaxi | Ecuador | -1.05 | -78.72 | 10344 | 8692 |
| Sisimbe | city | Provincia de Los Rios | Ecuador | -1.40 | -79.38 | 1824 | 10093 |
| Sitio Cordova | city | Provincia del Guayas | Ecuador | -2.17 | -79.52 | 439 | 44441 |
| Sitio Corral | city | Provincia de Zamora Chinchipe | Ecuador | -4.62 | -79.03 | 5059 | 414 |
| Sitio Nuevo | city | Provincia del Guayas | Ecuador | -2.30 | -79.83 | 6 | 28759 |
| Sitio Nuevo | city | Provincia del Azuay | Ecuador | -2.93 | -79.78 | 118 | 5629 |
| Sitio Nuevo | city | Provincia del Guayas | Ecuador | -1.88 | -80.70 | 426 | 4942 |
| Sitio Nuevo | city | Provincia del Guayas | Ecuador | -2.33 | -79.78 | 131 | 13937 |
| Sitio Nuevo | city | Provincia del Guayas | Ecuador | -2.57 | -80.33 | 127 | 4965 |
| Sitio Palmar | city | Provincia de Zamora Chinchipe | Ecuador | -4.57 | -79.03 | 6535 | 447 |
| Sitios de Mamanica | city | Provincia del Guayas | Ecuador | -1.95 | -79.60 | 121 | 13547 |
| Situchi | city | Provincia de Morona Santiago | Ecuador | -2.81 | -77.31 | 1023 | 0 |
| Situchi Civil | city | Provincia de Morona Santiago | Ecuador | -2.78 | -77.27 | 1040 | 0 |
| Sivia | city | Provincia de Pichincha | Ecuador | -0.27 | -78.45 | 8904 | 154200 |