| Name of the place | CERL ID of a place | Country | Longitude | Latitude | |
|---|---|---|---|---|---|
| Midwolda | — | Netherlands | 7.016111 | 53.192778 | |
| Mijdrecht | cnl00023246 | Netherlands | 4.866667 | 52.2 | |
| Mikulov | cnl00011705 | Czech Republic | 16.64 | 48.81 | |
| Milano | cnl00016128 | Italy | 9.19944444444445 | 45.46 | |
| Milano [non-CERL] | — | — | — | — | |
| Milborne-Port | cnl00003130 | England | -2.46055555555556 | 50.9663888888889 | |
| Milford (Wiltshire) | cnl00050694 | England | -1.774 | 51.076 | |
| Milland (Sussex) | cnl00050689 | England | -0.80607 | 51.03601 | |
| Millau | cnl00011710 | France | 3.08 | 44.1 | |
| Milston (Wiltshire) | cnl00050684 | England | -1.767 | 51.207 | |
| Milton Keynes | cnl00030053 | England | -0.733333333333333 | 52.0166666666667 | |
| Mindelheim | cnl00016143 | Germany | 10.48 | 48.0497222222222 | |
| Minden | cnl00011720 | Germany | 8.92 | 52.28 | |
| Mirandola | cnl00011733 | Italy | 11.07 | 44.88 | |
| Mirecourt | cnl00011737 | France | 6.13 | 48.3 | |
| Missolonghi | cnl00002965 | Greece | 21.4330555555556 | 38.3830555555556 | |
| Mizoën | cnl00022737 | France | 6.1431 | 45.0511 | |
| Mobile (Alabama) | cnl00029841 | United States | — | — | |
| Modena | cnl00006229 | Italy | 10.9330555555556 | 44.6497222222222 | |
| Modena [non-CERL] | — | — | — | — | |
| Moerkapelle | — | Netherlands | 4.575278 | 52.045556 | |
| Moers | cnl00011769 | Germany | 6.65 | 51.45 | |
| Moffat (Dumfriesshire) | cnl00026708 | Scotland | -3.442 | 55.332 | |
| Mohrungen (Morąg) | cnl00000712 | Poland | 19.92602 | 53.91711 | |
| Moirans | cnl00038930 | France | — | — |