| Code | Name | Region |
|---|---|---|
| FROFM | Oberhoffen-sur-moder | 67 |
| FROMD | Obermodern | 67 |
| FROJW | Obermorschwihr | 68 |
| FROBE | Obernai | 67 |
| FROBZ | Oberstinzel | 57 |
| FROBJ | Objat | 19 |
| FR2CC | Occey | 52 |
| FRQAE | Ocquerre | 77 |
| FROQV | Ocqueville | 76 |
| FROCT | Octeville-sur-mer | 76 |
| FROTH | Octon | 34 |
| FROD3 | Odars | 31 |
| FRODE | Odenas | 69 |
| FRRH6 | Oderen | 68 |
| FRODS | Odos | 65 |
| FROMG | Oermingen | 67 |
| FROEQ | Oeting | 57 |
| FRNYN | Noyen-sur-sarthe | 72 |
| FRXVY | Noyen-sur-seine | 77 |
| FRNYR | Noyers | |
| FRJFD | Noyers-saint-martin | 60 |
| FRRXC | Noyers-sur-cher | 41 |
| FRNOY | Noyon | 60 |
| FRZFW | Nozay | 44 |
| FRNY9 | Nozay | 91 |
| FRNU2 | Nuaille | 49 |
| FRNUC | Nuces | 12 |
| FRNCU | Nucourt | 95 |
| FRZNA | Nueil-les-aubiers | 79 |
| FRXNL | Nueil-sur-layon | 49 |
| FRNJN | Nuelles | 69 |
| FRNUO | Nuisement-sur-coole | 51 |
| FRNSG | Nuits-saint-georges | 21 |
| FRNUL | Nully | 52 |
| FRNUR | Nurieux-volognat | 1 |
| FRNXI | Nux-les-mines | 62 |
| FRNYS | Nyls | 66 |
| FRNAL | Novalaise | 73 |
| FRNS5 | Noveant-sur-moselle | 57 |
| FRNOV | Noves | 13 |
| FRW2C | Novillars | 25 |
| FR4NP | Novion-porcien | 8 |
| FRNYD | Noyal | 22 |
| FRN9C | Noyal-chatillon-sur-seiche | 35 |
| FRNPO | Noyal-pontivy | 56 |
| FR5VT | Noyal-sous-bazouges | 35 |
| FRNSV | Noyal-sur-vilaine | 35 |
| FRYNT | Noyant | 49 |
| FRNTC | Noyant-et-aconin | 2 |
| FRNYG | Noyant-la-gravoyere | 49 |