Municipios: Y
19 municipios
| Municipio | Provincia | Rango de CP | Códigos postales |
|---|---|---|---|
| Yaiza | Las Palmas | 35570–35580 | 2 |
| Yanguas | Soria | 42172 | 1 |
| Yanguas de Eresma | Segovia | 40493 | 1 |
| Yebes | Guadalajara | 19139 | 1 |
| Yebra | Guadalajara | 19111 | 1 |
| Yebra de Basa | Huesca | 22611 | 1 |
| Yecla | Murcia | 30510 | 1 |
| Yeles | Toledo | 45220 | 1 |
| Yepes | Toledo | 45313 | 1 |
| Yesa | Navarra | 31410 | 1 |
| Yeste | Albacete | 02480–02489 | 6 |
| Yuncler | Toledo | 45529 | 1 |
| Yunclillos | Toledo | 45591 | 1 |
| Yuncos | Toledo | 45210 | 1 |
| Yunquera | Málaga | 29410 | 1 |
| Yunquera de Henares | Guadalajara | 19210 | 1 |
| Yunta, La | Guadalajara | 19361 | 1 |
| Yátova | Valencia | 46367 | 1 |
| Yébenes, Los | Toledo | 45470–45480 | 2 |