| Code | Name | Region |
|---|---|---|
| FRCB9 | Coublanc | 71 |
| FROBV | Coublevie | 38 |
| FRCQ6 | Coublucq | 64 |
| FR9HQ | Coubon | 43 |
| FRUHS | Couches | 71 |
| FRYHC | Couchey | 21 |
| FRC2Y | Coucy-le-chateau-auffrique | 2 |
| FROYS | Coucy-les-eppes | 2 |
| FRDCC | Couddes | 41 |
| FRCKQ | Coudekerque | 59 |
| FRCOK | Coudekerque-branche | 59 |
| FRCUO | Coudes | 63 |
| FRCOI | Coudeville | 50 |
| FRDOX | Coudoux | 13 |
| FRCIT | Cornimont | 88 |
| FRR2N | Coron | 49 |
| FR2RP | Corpe | 85 |
| FRCPU | Corpeau | 21 |
| FRCND | Corps-nuds | 35 |
| FRCQ2 | Corquilleroy | 45 |
| FRC82 | Corquoy | 18 |
| FRLKM | Correns | 83 |
| FRZOY | Correze | 19 |
| FRCR7 | Corronsac | 31 |
| FROIA | Corscia | 2B |
| FRCXZ | Corseul | 22 |
| FRQCR | Corte | 2B |
| FROAT | Corveissiat | 1 |
| FRCUU | Corvol-l'orgueilleux | 58 |
| FRZZG | Corze | 49 |
| FRCCA | Cosnac | 19 |
| FRCCL | Cosne-cours-sur-loire | 58 |
| FROSD | Cosne-d'allier | 3 |
| FRF4D | Cosnes-et-romain | 54 |
| FRXXL | Cormelles-le-royal | 14 |
| FRCNX | Cormenon | 41 |
| FRZMY | Cormeray | 41 |
| FROMR | Cormery | 37 |
| FRQQQ | Cormicy | 51 |
| FROMU | Cormontreuil | 51 |
| FROUM | Cormoranche-sur-saone | 1 |
| FRYXX | Cormoyeux | 51 |
| FRCR6 | Cornas | 7 |
| FRBHU | Cornassat | 3 |
| FRCXE | Corne | |
| FRCO2 | Corne | 49 |
| FRYYU | Cornebarrieu | 31 |
| FRNJI | Corneilhan | 34 |
| FRRFD | Corneilla-del-vercol | 66 |
| FRTSY | Corneilla-la-riviere | 66 |