| Communes |
| Prondines, Riom |
| Prompsat, Riom |
| Pouzol, Riom |
| Pontgibaud, Riom |
| Pontaumur, Riom |
| Pionsat, Riom |
| Pessat-Villeneuve, Riom |
| Neuf-Église, Riom |
| Ménétrol, Riom |
| Mozac, Riom |
| Moureuille, Riom |
| Montpensier, Riom |
| Montfermy, Riom |
| Montel-de-Gelat, Riom |
| Montcel, Riom |
| Montaigut, Riom |
| Mons, Riom |
| Miremont, Riom |
| Messeix, Riom |
| Menat, Riom |
| Martres-sur-Morge, Riom |
| Marsat, Riom |
| Maringues, Riom |
| Marcillat, Riom |
| Manzat, Riom |
| Malintrat, Riom |
| Malauzat, Riom |
| Luzillat, Riom |
| Lussat, Riom |
| Loubeyrat, Riom |