| Town Name | Type | Region | Province / State | County | Municipality | Population | Latitude | Longitude | |
|---|---|---|---|---|---|---|---|---|---|
| Mataró | town | 116698 | 41.538174 | 2.448863 | Map | ||||
| Mayorga | village | 1963 | 42.166630 | -5.262700 | Map | ||||
| Mazarambroz | village | 1267 | 39.694389 | -4.021116 | Map | ||||
| Mazarrón | town | Región de Murcia | 12502 | 37.598381 | -1.313902 | Map | |||
| Meco | town | Comunidad de Madrid | Madrid | 12580 | 40.553745 | -3.328156 | Map | ||
| Medellín | village | Extremadura | Badajoz | 1982 | 38.963615 | -5.956882 | Map | ||
| Medina de las Torres | village | Extremadura | Badajoz | 1330 | 38.341427 | -6.411837 | Map | ||
| Medina de Pomar | town | 6225 | 42.932209 | -3.486117 | Map | ||||
| Medina de Rioseco | village | 4973 | 41.883270 | -5.042985 | Map | ||||
| Medina del Campo | town | 21290 | 41.308525 | -4.915052 | Map | ||||
| Medina Sidonia | town | 10279 | 36.457672 | -5.927272 | Map | ||||
| Mejorada | village | 1329 | 40.009884 | -4.884886 | Map | ||||
| Mejorada del Campo | town | Comunidad de Madrid | Madrid | 21689 | 40.397179 | -3.489607 | Map | ||
| Melgar de Fernamental | village | 1753 | 42.403976 | -4.244282 | Map | ||||
| Meliana | town | 10536 | 39.528477 | -0.348861 | Map | ||||
| Melide | town | 7900 | 42.914574 | -8.013614 | Map | ||||
| Membrilla | village | 6362 | 38.972889 | -3.346015 | Map | ||||
| Menasalbas | village | 3229 | 39.641014 | -4.283656 | Map | ||||
| Mendaro | village | Euskadi | Gipuzkoa | 1444 | 43.252499 | -2.385839 | Map | ||
| Mendavia | village | 3796 | 42.444328 | -2.200421 | Map | ||||
| Mendigorría | village | 1073 | 42.626560 | -1.833865 | Map | ||||
| Mengíbar | town | 10000 | 37.967995 | -3.808773 | Map | ||||
| Méntrida | village | Castilla-La Mancha | Toledo | 2702 | 40.237904 | -4.194553 | Map | ||
| Mequinenza | village | 2495 | 41.369537 | 0.300160 | Map | ||||
| Miengo | village | Cantabria | Cantabria | 1329 | 43.430698 | -4.000031 | Map |