| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Maidstone (Kent) | cnl00011458 | England | 0.52 | 51.27 | |
| Maillé | cnl00003103 | France | -0.783055555555556 | 46.35 | |
| Maillot | cnl00021393 | France | — | — | |
| Mainz | cnl00016129 | Germany | 8.26944444444445 | 50.0 | |
| Mainz [non-CERL] | — | — | — | — | |
| Maisons-Alfort | cnl00027228 | France | 2.43305555555556 | 48.7991666666667 | |
| Majano di Mestre | cnl00021583 | Italy | 13.066667 | 46.183333 | |
| Màlaga | cnl00000889 | Spain | -4.41666666666667 | 36.7166666666667 | |
| Malatya | cnl00017363 | Turkey | 38.309669 | 38.356869 | |
| Malborow | — | No country: false imprint | — | — | |
| Mallow | cnl00018993 | — | — | — | |
| Malmesbury | cnl00027969 | England | -2.1 | 51.5830555555556 | |
| Malmö | cnl00011477 | Sweden | 13.0 | 55.6 | |
| Malpas (Cheshire) | cnl00045931 | England | -2.76666666666667 | 53.0166666666667 | |
| Malta | cnl00001239 | Malta | — | — | |
| Maltot | cnl00022562 | France | — | — | |
| Mamers | cnl00017987 | France | — | — | |
| Manche | cnl00026955 | France | — | — | |
| Manchester | cnl00011485 | England | -2.245278 | 53.479444 | |
| Mandres | cnl00050780 | France | 2.5444 | 48.7022 | |
| Mane | cnl00018008 | France | 5.7683 | 43.9392 | |
| Mannheim | cnl00016131 | Germany | 8.46 | 49.49 | |
| Manosque | cnl00003108 | France | 5.78305555555556 | 43.8330555555556 | |
| Mansfield (Nottinghamshire) | cnl00000935 | England | -1.19944444444444 | 53.1494444444444 | |
| Mantes-la-Jolie | cnl00011500 | France | 1.72 | 48.98 |