lieux fictifs
| Nom | Type | Notoriété | Popularité |
|---|---|---|---|
| Mont Iseran | Montagne | 2 | 1.7 |
| Monts Brumeux | Concept | 27 | 14.7 |
| Morannon | Concept | 17 | 5.4 |
| Mordor | Concept | 48 | 89.3 |
| Moria | Concept | 39 | 79.3 |
| Mu | Concept | 42 | 134.4 |
| Multivers | Concept | 2 | 2.1 |
| Multivers Dc | Concept | 11 | 26.7 |
| Murandy | Concept | 3 | 0.0 |
| Muspellheim | Concept | 43 | 34.0 |
| Mustafar | Concept | 22 | 18.8 |
| Mute City | Concept | 1 | 0.2 |
| Mygeeto | Astre | 5 | 0.0 |
| Mystara | Jeu | 6 | 2.7 |
| Mythe de Cthulhu | Oeuvre | 37 | 187.4 |
| Métamonde | Concept | 3 | 0.9 |
| Mûmak | Concept | 17 | 16.1 |
| Naboo | Lieu | 29 | 55.7 |
| Nakanotorishima | Concept | 6 | 0.1 |
| Nal Hutta | Concept | 5 | 0.7 |
| Nargothrond | Concept | 24 | 8.9 |
| Narnia | Concept | 32 | 132.5 |
| Nation de 1984 | Concept | 7 | 0.0 |
| Neome | Concept | 2 | 1.2 |
| Neptune en Fiction | Concept | 6 | 0.4 |
| New Babylon | Concept | 2 | 5.7 |
| New Crobuzon | Concept | 4 | 1.4 |
| Nibiru | Astre | 29 | 82.7 |
| Nidavellir | Concept | 23 | 19.7 |
| Niedzdrow | Concept | 1 | 0.3 |
| Niflheim | Concept | 45 | 72.3 |
| Niflhel | Concept | 8 | 8.7 |
| Nirn | Concept | 3 | 10.8 |
| Nogrod | Concept | 11 | 3.0 |
| Norembergue | Concept | 8 | 5.9 |
| North Haverbrook | Concept | 2 | 0.1 |
| Nouveau-groenland Méridional | Concept | 17 | 1.0 |
| Nouvel Empire Galactique | Concept | 3 | 0.0 |
| Nouvelle République | Concept | 22 | 46.3 |
| Nuevo Rico | Concept | 9 | 4.8 |
| Náströnd | Concept | 22 | 2.4 |
| Nóatún | Concept | 16 | 1.3 |
| Númenor | Concept | 37 | 117.0 |
| Oa | Concept | 4 | 0.5 |
| Océan de Lait | Concept | 22 | 1.1 |
| Océania | Concept | 15 | 22.9 |
| Oddworld | Oeuvre | 15 | 24.3 |
| Ogygie | Concept | 24 | 17.6 |
| Omale | Concept | 1 | 0.0 |
| Omégaverse | Concept | 15 | 8.9 |