| Town Name | Type | Region | Province / State | County | Municipality | Population | Latitude | Longitude | |
|---|---|---|---|---|---|---|---|---|---|
| Segurilla | village | 1263 | 40.023048 | -4.864261 | Map | ||||
| Selaya | village | Cantabria | Cantabria | 1571 | 43.217785 | -3.806637 | Map | ||
| Selva | village | 2071 | 39.754482 | 2.900718 | Map | ||||
| Sencelles | village | 2898 | 39.647789 | 2.897858 | Map | ||||
| Sentmenat | village | 6371 | 41.611050 | 2.137446 | Map | ||||
| Senyera | village | 1192 | 39.063553 | -0.509966 | Map | ||||
| Sepúlveda | village | 1043 | 41.297371 | -3.749370 | Map | ||||
| Serón | village | 2175 | 37.343719 | -2.508424 | Map | ||||
| Seròs | village | 1867 | 41.463669 | 0.411868 | Map | ||||
| Serra | village | 2337 | 39.685444 | -0.428490 | Map | ||||
| Serra de Outes | town | Galicia | A Coruña | 1064 | 42.842812 | -8.908310 | Map | ||
| Serrada | village | 1184 | 41.456944 | -4.862539 | Map | ||||
| Serranillos del Valle | village | Comunidad de Madrid | Madrid | 3440 | 40.203773 | -3.884348 | Map | ||
| Ses Salines | village | Illes Balears | Illes Balears | 2317 | 39.339199 | 3.054137 | Map | ||
| Seseña | town | Castilla-La Mancha | Toledo | 12513 | 40.104828 | -3.696309 | Map | ||
| Seseña Nuevo | town | Castilla-La Mancha | Toledo | 4977 | 40.107857 | -3.651772 | Map | ||
| Sesma | village | 1264 | 42.477222 | -2.085949 | Map | ||||
| Sestao | town | 29224 | 43.309433 | -3.007595 | Map | ||||
| Setenil de las Bodegas | village | 2844 | 36.862183 | -5.178700 | Map | ||||
| Seva | village | 2169 | 41.835873 | 2.284768 | Map | ||||
| Sevilla | city | 703206 | 37.388630 | -5.995317 | Map | ||||
| Sevilla la Nueva | village | Comunidad de Madrid | Madrid | 7140 | 40.348171 | -4.028106 | Map | ||
| Sierra de Yeguas | village | 3274 | 37.124252 | -4.868987 | Map | ||||
| Siete Aguas | village | 1423 | 39.471767 | -0.916900 | Map | ||||
| Sigüeiro | town | 3355 | 42.968784 | -8.441745 | Map |