| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Medinaceli | cnl00021760 | Spain | -2.434722 | 41.171667 | |
| Meersburg am Bodensee | cnl00031289 | — | — | — | |
| Megalopolis | cnl00019898 | — | — | — | |
| Mehun-sur-Yèvre | cnl00023112 | — | — | — | |
| Meiningen | cnl00011631 | Germany | 10.4194444444444 | 50.5494444444444 | |
| Meißen | cnl00011634 | Germany | 13.48 | 51.1497222222222 | |
| Meisenheim | cnl00011633 | — | 7.66944444444445 | 49.7194444444444 | |
| Melbourne (Derbyshire) | cnl00050729 | England | -1.429 | 52.823 | |
| Meldorf | cnl00011639 | Germany | 9.08 | 54.08 | |
| Melun | cnl00011646 | France | 2.67 | 48.53 | |
| Memmingen | cnl00016139 | Germany | 10.1805555555556 | 46.5180555555556 | |
| Mende | cnl00011649 | France | 3.5 | 44.52 | |
| Menen | cnl00011621 | Belgium | 3.12 | 50.7997222222222 | |
| Menetou-Salon | cnl00019608 | — | 2.05 | 47.2333333333333 | |
| Ménil-la-Horgne | cnl00020426 | France | — | — | |
| Meppel | cnl00005321 | Netherlands | 6.18305555555556 | 52.7 | |
| Meppershall | — | England | -0.34 | 52.017 | |
| Mer | — | France | — | — | |
| Mérida | cnl00002827 | Spain | -6.35 | 38.8833333333333 | |
| Merthyr Tudful | cnl00017564 | Wales | — | — | |
| Mesen | cnl00045359 | Belgium | — | — | |
| Messina | cnl00011678 | Italy | 15.55 | 38.19 | |
| Messina [non-CERL] | — | — | — | — | |
| Metslawier | — | Netherlands | 6.067778 | 53.36 | |
| Mettmann | cnl00032637 | Germany | — | — |