| COM12 | Rodez Comtal | 16000 | | | | | | |
| MIL12 | Millau | 14000 | | | | | | |
| FOR12 | Rodez Forveille | 11000 | | | | | | |
| VRO12 | Villefranche-de-Rouergue | 8000 | | | | | | |
| DEC12 | Decazeville | 4900 | | | | | | |
| SAF12 | Saint-Affrique | 4600 | | | | | | |
| PRI12 | Luc-la-Primaube La Primaube | 3200 | | | | | | |
| ESP12 | Espalion | 3100 | | | | | | |
| CDG12 | Capdenac-Gare | 2900 | | | | | | |
| BAR12 | Baraqueville | 2300 | | | | | | |
| SEB12 | Sébazac-Concourès | 2200 | | | | | | |
| GUA12 | Aubin Le Gua | 2200 | | | | | | |
| LAI12 | Laissac | 2000 | | | | | | |
| SEV12 | Sévérac-le-Château | 1900 | | | | | | |
| NAG12 | Naucelle Gare | 1700 | | | | | | |
| STZ12 | Saint-Geniez-d'Olt | 1600 | | | | | | |
| BOZ12 | Bozouls | 1600 | | | | | | |
| VLY12 | Valady | 1600 | | | | | | |
| REQ12 | Réquista | 1500 | | | | | | |
| MCL12 | Marcillac-Vallon | 1450 | | | | | | |
| AGU12 | Aguessac | 1450 | | | | | | |
| RIG12 | Rignac | 1400 | | | | | | |
| FIR12 | Firmi | 1400 | | | | | | |
| MBZ12 | Montbazens | 1400 | | | | | | |
| RYX12 | Rieupeyroux | 1300 | | | | | | |
| MDZ12 | Mur-de-Barrez | 1300 | | | | | | |
| BOI12 | Boisse-Penchot | 1100 | | | | | | |
| VVE12 | Villeneuve | 1050 | | | | | | |
| FLA12 | Flavin | 1050 | | | | | | |
| DRU12 | Druelle | 1000 | | | | | | |
| LAG12 | Laguiole | 950 | | | | | | |
| SGL12 | Saint-Georges-de-Luzençon | 900 | | | | | | |
| ENT12 | Entraygues-sur-Truyère | 850 | | | | | | |
| PSA12 | Pont-de-Salars | 850 | | | | | | |
| FOU12 | La Fouillade | 800 | | | | | | |
| ROQ12 | Roquefort-sur-Soulzon | 800 | | | | | | |
| LEV12 | La Bastide-l'Évêque | 750 | | | | | | |
| SSC12 | Salles-la-Source | 750 | | | | | | |
| GAG12 | Montrozier Gages | 700 | | | | | | |
| CAV12 | La Cavalerie | 700 | | | | | | |
| OLT12 | Saint-Côme-d'Olt | 700 | | | | | | |
| SN812 (COM12) | Rodez Sauniers | 650 | | | | | | |
| SVA12 | Sanvensa | 650 | | | | | | |
| L2C12 | Luc-la-Primaube | 650 | | | | | | |
| CMR12 | Camarès | 600 | | | | | | |
| NAN12 | Nant | 600 | | | | | | |
| QUE12 | Montlaur Querbes | 550 | | | | | | |
| AGE12 | Agen-d'Aveyron | 550 | | | | | | |
| OUJ12 | La Loubière Lioujas Castelets | 500 | | | | | | |
| ELT12 | Sainte-Eulalie-d'Olt Ste eulalie d olt | 500 | | | | | | |
| OPS12 | Olemps | 500 | | | | | | |
| TLJ12 | Toulonjac | 500 | | | | | | |
| GBK12 | Gabriac | 500 | | | | | | |
| GLX12 | Anglars-Saint-Félix Anglars st felix | 500 | | | | | | |
| XAL12 | Baraqueville Lax | 500 | | | | | | |
| B7N12 (COM12) | Rodez Bourran | 500 | | | | | | |
| RTO12 | Bertholène | 500 | | | | | | |
| QBP12 | Coubisou U le puech | 500 | | | | | | |
| LBW12 | Martiel elbes | 500 | | | | | | |
| MEM12 | Vailhourles Memer | 500 | | | | | | |
| MTI12 | Martiel | 500 | | | | | | |
| SOK12 | Sonnac C 12 | 500 | | | | | | |
| YBG12 | Trémouilles Bourg | 500 | | | | | | |
| SDR12 | Sauveterre-de-Rouergue | 400 | | | | | | |
| SLE12 | Saint-Léons | 350 | | | | | | |
| BRO12 | Broquiès | 350 | | | | | | |
| S8C12 | Savignac | 350 | | | | | | |
| COQ12 | Conques | 250 | | | | | | |
| LFI12 | Millau Les Fialets | 200 | | | | | | |
| GRV12 | Conques Grand vabre | 0 | | | | | | |
| SCY12 | Conques St cyprien sur dourdou | 0 | | | | | | |
| NLH12 | Conques Noailhac 12 | 0 | | | | | | |
| RQZ12 | Roquefort-sur-Soulzon N | 0 | | | | | | |
Taille moyenne des NRA : 1 679 lignes
Taille du NRA médian : 750 lignes
122 600 lignes au total