| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Moscow | cnl00006223 | Russia | 37.6166666666667 | 55.75 | |
| Moskva | cnl00006223 | — | 37.6166666666667 | 55.75 | |
| Moulins | cnl00011956 | France | 3.33 | 46.57 | |
| Mouzon-sur-Meuse | cnl00023295 | France | 5.0668 | 49.6 | |
| Muggleswick (Durham) | — | England | — | — | |
| Mühlebach | cnl00049279 | Switzerland | — | — | |
| Mulhouse | cnl00006226 | — | 7.33305555555556 | 47.75 | |
| München | cnl00030740 | Germany | 11.58 | 48.1491666666667 | |
| Mundelsheim | cnl00043865 | Germany | 9.20777777777778 | 49.0005555555556 | |
| Münster | cnl00027430 | Germany | 7.62944444444445 | 51.96 | |
| Múrcia | cnl00012012 | Spain | -1.12 | 37.98 | |
| Murcia-Algezares | cnl00048480 | Spain | -1.11111111111111 | 37.9441666666667 | |
| Musselburgh | cnl00026712 | Scotland | -3.04972222222222 | 55.95 | |
| Mussidan | cnl00022170 | France | 0.3664 | 45.0358 | |
| Mussy-sur-Seine | cnl00019598 | France | — | — | |
| Myrina (Aeolis) | — | Turkey | — | — | |
| Naarden | cnl00012036 | Netherlands | 5.16 | 52.3 | |
| Naestved | cnl00046002 | Denmark | — | — | |
| Nägelstedt (Bad Langensalza) | cnl00047252 | Germany | 10.7094444444444 | 51.1094444444444 | |
| Nagyszőlős | cnl00016684 | Ukraine | 22.5027777777778 | 48.1333333333333 | |
| Namur | cnl00012048 | Belgium | 4.87 | 50.47 | |
| Nançay | — | France | — | — | |
| Nancray | cnl00048405 | France | — | — | |
| Nancy | cnl00012051 | France | 6.2 | 48.68 | |
| Nancy [non-CERL] | — | — | — | — |