| Monda | Málaga | 29110 | 1 |
| Mondariz | Pontevedra | 36870–36879 | 3 |
| Mondariz-Balneario | Pontevedra | 36890 | 1 |
| Mondoñedo | Lugo | 27740–27791 | 7 |
| Mondéjar | Guadalajara | 19110 | 1 |
| Monegrillo | Zaragoza | 50164 | 1 |
| Monesterio | Badajoz | 06260 | 1 |
| Moneva | Zaragoza | 50144 | 1 |
| Monfero | A Coruña | 15315–15619 | 4 |
| Monflorite-Lascasas | Huesca | 22111 | 1 |
| Monforte de la Sierra | Salamanca | 37618 | 1 |
| Monforte de Lemos | Lugo | 27400–27592 | 15 |
| Monforte del Cid | Alicante | 03670–03679 | 2 |
| Monistrol de Montserrat | Barcelona | 08691 | 1 |
| Monreal de Ariza | Zaragoza | 50291 | 1 |
| Monreal del Campo | Teruel | 44300 | 1 |
| Monreal/Elo | Navarra | 31471 | 1 |
| Monroy | Cáceres | 10194 | 1 |
| Monroyo | Teruel | 44652 | 1 |
| Monsagro | Salamanca | 37532 | 1 |
| Mont-roig del Camp | Tarragona | 43300–43892 | 3 |
| Montagut i Oix | Girona | 17855–17856 | 2 |
| Montalbanejo | Cuenca | 16434 | 1 |
| Montalbo | Cuenca | 16440 | 1 |
| Montalbán | Teruel | 44700–44709 | 2 |
| Montalbán de Córdoba | Córdoba | 14548 | 1 |
| Montalvos | Albacete | 02638 | 1 |
| Montamarta | Zamora | 49149 | 1 |
| Montanejos | Castellón | 12448 | 1 |
| Montanuy | Huesca | 22486–22487 | 2 |
| Montaverner | Valencia | 46892 | 1 |
| Montblanc | Tarragona | 43400–43459 | 5 |
| Montbrió del Camp | Tarragona | 43340 | 1 |
| Montcada i Reixac | Barcelona | 08110 | 1 |
| Montclar | Barcelona | 08605 | 1 |
| Monteagudo de las Vicarías | Soria | 42220 | 1 |
| Monteagudo del Castillo | Teruel | 44146 | 1 |
| Montealegre de Campos | Valladolid | 47186–47816 | 2 |
| Montealegre del Castillo | Albacete | 02650 | 1 |
| Montearagón | Toledo | 45685 | 1 |
| Montederramo | Ourense | 32750–32790 | 4 |
| Montefrío | Granada | 18270 | 1 |
| Montejaque | Málaga | 29360 | 1 |
| Montejo de Arévalo | Segovia | 40468 | 1 |
| Montejo de Tiermes | Soria | 42315–42344 | 2 |
| Montejícar | Granada | 18561 | 1 |
| Montellano | Sevilla | 41770 | 1 |
| Montellà i Martinet | Lleida | 25724–25725 | 2 |
| Montemayor | Córdoba | 14530 | 1 |
| Montemayor de Pililla | Valladolid | 47320 | 1 |
| Montemayor del Río | Salamanca | 37727 | 1 |
| Montemolín | Badajoz | 06291–06908 | 3 |
| Monterde | Zaragoza | 50213 | 1 |
| Monterde de Albarracín | Teruel | 44368 | 1 |
| Monterrei | Ourense | 32611–32618 | 2 |
| Monterroso | Lugo | 27215–27569 | 4 |
| Monterrubio de la Demanda | Burgos | 09615 | 1 |
| Monterrubio de la Serena | Badajoz | 06427 | 1 |
| Monterrubio de la Sierra | Salamanca | 37781 | 1 |
| Montesa | Valencia | 46692 | 1 |