PLZ in Niedersachsen - "M"
| Stadt | Kreis | Einwohner |
|---|
| Melle | Osnabrück | 10,900 |
| Meppen | Emsland | 16,100 |
| Munster | Heidekreis | 8,100 |
| Maasen | Diepholz | 74 |
| Marienhagen | - | 525 |
| Mariental | Helmstedt | 185 |
| Marklohe | Nienburg (Weser) | 2,000 |
| Marschacht | Harburg | 5,900 |
| Martfeld | Diepholz | 723 |
| Marxen | Harburg | 1,100 |
| Mechtersen | Lüneburg | 343 |
| Meerbeck | Schaumburg | 1,400 |
| Meine | Gifhorn | 3,100 |
| Meinersen | Gifhorn | 2,700 |
| Menslage | Osnabrück | 571 |
| Merzen | Osnabrück | 985 |
| Midlum | Nordfriesland | 653 |
| Mittelstenahe | Cuxhaven | 651 |
| Moisburg | Harburg | 1,500 |
| Molbergen | Cloppenburg | 2,100 |
| Moormerland | Leer | 23,000 |
| Moringen | Northeim | 3,500 |
| Müden | Gifhorn | 2,500 |