| Code | Name | Region |
|---|---|---|
| FRROO | Orleans Sta/rouen | 76 |
| FRYLR | Orly | 94 |
| FRORY | Orly Apt/paris | 94 |
| FROMA | Ormes | 10 |
| FROME | Ormes | 27 |
| FROML | Ormes | 45 |
| FRORM | Ormes | 51 |
| FROMS | Ormes | 71 |
| FRPV7 | Ormesson-sur-marne | 94 |
| FRORO | Ormoy | 91 |
| FROYV | Ormoy-villers | 60 |
| FRPV8 | Ornaisons | 11 |
| FRONS | Ornans | 25 |
| FRORX | Ornex | 1 |
| FROZM | Ornezan | 32 |
| FRORN | Ornon | 38 |
| FRJTT | Oron | 57 |
| FRORC | Orchies | 59 |
| FROCI | Orcieres | 5 |
| FROCZ | Orcines | 63 |
| FROQ9 | Ordan-larroque | 32 |
| FRA8N | Ordonnaz | 1 |
| FROO2 | Ore | 31 |
| FRO8J | Oree D'anjou | 49 |
| FROGL | Orgelet | 39 |
| FRO7Y | Orgenoy | 77 |
| FROGJ | Orgeres | 35 |
| FRB9G | Orgeres-en-beauce | 28 |
| FRORW | Orgerus | 78 |
| FRO6R | Orges | 52 |
| FRORG | Orgeval | 2 |
| FROVY | Orgeval | 78 |
| FROGN | Orgon | 13 |
| FROR8 | Origne | 33 |
| FROGS | Orignolles | 17 |
| FROYT | Origny-en-thierache | 2 |
| FROBB | Origny-sainte-benoite | 2 |
| FROEB | Ons-en-bray | 60 |
| FRONL | Onville | 54 |
| FROZN | Onzain | 41 |
| FROPI | Opio | 6 |
| FROPP | Oppede | 84 |
| FRO2A | Oraas | 64 |
| FROSG | Oradour-saint-genest | 87 |
| FROGE | Oradour-sur-glane | 87 |
| FROSV | Oradour-sur-vayres | 87 |
| FROSO | Oraison | 4 |
| FRORA | Orange | 84 |
| FROJ9 | Orbagna | 39 |
| FRMZY | Orbais-l'abbaye | 51 |