| FAU42 | Saint-Étienne Fauriel | 46000 | | | | | | |
| JMA42 | Roanne Jean Mace | 38000 | | | | | | |
| CHA42 | Le Chambon-Feugerolles | 22000 | | | | | | |
| TRA42 | Saint-Étienne Terrasse | 21000 | | | | | | |
| SCH42 | Saint-Chamond | 20000 | | | | | | |
| BEL42 | Saint-Étienne Bellevue | 19000 | | | | | | |
| MTB42 | Montbrison | 13000 | | | | | | |
| RIV42 | Rive-de-Gier | 12000 | | | | | | |
| ESS42 | Andrézieux-Bouthéon Essarts | 11000 | | | | | | |
| LTA42 | La Talaudière | 8000 | | | | | | |
| LAG42 | La Grand-Croix | 8000 | | | | | | |
| FEU42 | Feurs | 7000 | | | | | | |
| MET42 | Saint-Étienne Metare | 6000 | | | | | | |
| VEA42 | Veauche | 6000 | | | | | | |
| MDS42 | Montrond-les-Bains | 6000 | | | | | | |
| ROC42 | Roche-la-Molière | 6000 | | | | | | |
| CRL42 | Charlieu | 4200 | | | | | | |
| STR42 | Saint-Just-Saint-Rambert | 3600 | | | | | | |
| SGA42 | Saint-Galmier | 3600 | | | | | | |
| CHS42 | Chazelles-sur-Lyon | 3300 | | | | | | |
| VLS42 | Villars | 3100 | | | | | | |
| SUR42 | Sury-le-Comtal | 2900 | | | | | | |
| POU42 | Pouilly-sous-Charlieu | 2800 | | | | | | |
| SST42 | Saint-Genest-Lerpt | 2700 | | | | | | |
| RMP42 | Saint-Romain-le-Puy | 2700 | | | | | | |
| BON42 | Saint-Jean-Bonnefonds | 2600 | | | | | | |
| BOE42 | Boën | 2500 | | | | | | |
| TER42 | Saint-Étienne Terrenoire | 2500 | | | | | | |
| MAC42 | Maclas | 2500 | | | | | | |
| REN42 | Renaison | 2300 | | | | | | |
| STM42 | Saint-Marcellin-en-Forez | 2200 | | | | | | |
| BAL42 | Balbigny | 2200 | | | | | | |
| PEL42 | Pélussin | 2200 | | | | | | |
| LAF42 | La Fouillouse | 2200 | | | | | | |
| PAN42 | Panissières | 2100 | | | | | | |
| VTS42 | Villemontais | 2000 | | | | | | |
| NON42 | Pouilly-les-Nonains | 2000 | | | | | | |
| SCR42 | Saint-Christo-en-Jarez | 1900 | | | | | | |
| STH42 | Saint-Héand | 1900 | | | | | | |
| CHV42 | Chavanay | 1900 | | | | | | |
| BOU42 | Bourg-Argental | 1900 | | | | | | |
| STB42 | Saint-Bonnet-le-Château | 1800 | | | | | | |
| SGM42 | Saint-Genest-Malifaux | 1700 | | | | | | |
| MOL42 | Saint-Étienne Molina | 1700 | | | | | | |
| MED42 | Saint-Médard-en-Forez Aveizieux | 1600 | | | | | | |
| VR342 | Villerest | 1450 | | | | | | |
| GLV42 | Saint-Germain-Laval | 1450 | | | | | | |
| APC42 | Saint-André-d'Apchon | 1400 | | | | | | |
| PRX42 | Perreux | 1350 | | | | | | |
| JEE42 | Saint-Jean-Soleymieux | 1350 | | | | | | |
| SYM42 | Saint-Symphorien-de-Lay | 1300 | | | | | | |
| LAP42 | La Pacaudière | 1250 | | | | | | |
| MCG42 | Saint-Maurice-en-Gourgois | 1200 | | | | | | |
| PEN42 | Saint-Just-la-Pendue | 1200 | | | | | | |
| CUI42 | Cuinzier | 1200 | | | | | | |
| CDU42 | Chalain-d'Uzore | 1200 | | | | | | |
| SPB42 | Saint-Pierre-de-Boeuf | 1150 | | | | | | |
| SSZ42 | Sail-sous-Couzan | 1100 | | | | | | |
| NOI42 | Noirétable | 1100 | | | | | | |
| BLM42 | Belmont-de-la-Loire | 1100 | | | | | | |
| MVU42 | Montverdun | 1100 | | | | | | |
| BUS42 | Bussières | 1100 | | | | | | |
| AM342 | Ambierle | 1050 | | | | | | |
| LES42 | Saint-Germain-Lespinasse | 1050 | | | | | | |
| ROZ42 | Rozier-en-Donzy | 1000 | | | | | | |
| MER42 | Apinac Merle | 1000 | | | | | | |
| CRE42 | Cremeaux | 900 | | | | | | |
| JUH42 | Saint-Just-en-Chevalet | 900 | | | | | | |
| VEX42 | Saint-Cyr-de-Favières Les Verbeaux | 900 | | | | | | |
| USF42 | Usson-en-Forez | 900 | | | | | | |
| CHI42 | Chirassimont | 850 | | | | | | |
| NLS42 | Neulise | 850 | | | | | | |
| C9P42 | Saint-Cyprien | 850 | | | | | | |
| VOU42 | Vougy | 850 | | | | | | |
| BHY42 | Saint-Barthélemy-Lestra | 800 | | | | | | |
| BS342 | Boisset-Saint-Priest | 800 | | | | | | |
| PC742 | Saint-Paul-en-Cornillon | 800 | | | | | | |
| REG42 | Régny | 750 | | | | | | |
| SJM42 | Saint-Julien-Molin-Molette | 750 | | | | | | |
| PGX42 | Périgneux | 750 | | | | | | |
| ARH42 | Arthun La Terriere | 750 | | | | | | |
| PCS42 | Poncins | 750 | | | | | | |
| MRH42 | Marlhes | 700 | | | | | | |
| JZX42 | Jonzieux | 650 | | | | | | |
| VIG42 | Saint-Cyr-les-Vignes | 650 | | | | | | |
| PG742 | Saint-Polgues | 600 | | | | | | |
| RJA42 | Saint-Romain-en-Jarez | 550 | | | | | | |
| CLC42 | Chalain-le-Comtal | 550 | | | | | | |
| AXO42 | Andrézieux-Bouthéon | 500 | | | | | | |
| PLA42 | Planfoy | 500 | | | | | | |
| BIH42 | Briennon | 500 | | | | | | |
| JOD42 | Saint-Jodard | 500 | | | | | | |
| SMS42 | Saint-Martin-la-Sauveté | 500 | | | | | | |
| BM742 | Boisset-lès-Montrond | 500 | | | | | | |
| L1Q42 | Luriecq | 500 | | | | | | |
| BER42 | Saint-Étienne Beraudiere | 450 | | | | | | |
| L1M42 | Saint-Étienne-le-Molard | 400 | | | | | | |
| SJ842 | Saint-Joseph | 350 | | | | | | |
| GNA42 | Genilac La Cula | 350 | | | | | | |
| S7C42 | Saint-Chamond La Chabure | 300 | | | | | | |
| VSN42 | La Versanne | 250 | | | | | | |
| HOP42 | Saint-Cyr-de-Favières Hopital sur Rhins | 200 | | | | | | |
| CZ342 | Cezay | 100 | | | | | | |
Taille moyenne des NRA : 3 567 lignes
Taille du NRA médian : 1 250 lignes
367 450 lignes au total