| Code | Name | Region |
|---|---|---|
| CHCMR | Cormoret | JU |
| CHCOA | Cornaux | NE |
| CHCO2 | Cornol | JU |
| CHCMS | Corpataux-magnedens | FR |
| CHCSR | Corsier | GE |
| CHCOS | Corsier-sur-vevey | VD |
| CHCRT | Cortaillod | NE |
| CHCSN | Cossonay | VD |
| CHCOE | Courfaivre | 22 |
| CHCGY | Courgenay | JU |
| CHCDL | Courrendlin | JU |
| CHCRX | Courroux | JU |
| CHCOU | Court | BE |
| CHYHM | Courtaman | FR |
| CHCPS | Chippis | VS |
| CHCHX | Choex | VS |
| CHN66 | Choindez | JU |
| CHX6Z | Choulex | GE |
| CHCHR | Chur | GR |
| CHCLN | Clarens | VD |
| CHCLA | Clarmont | VD |
| CHCOI | Cointrin | GE |
| CHCBY | Collex-bossy | GE |
| CHCOD | Collina D'oro | TI |
| CHCOL | Collombey | VS |
| CHCBL | Collonge-bellerive | GE |
| CHCLG | Cologny | GE |
| CHCMB | Colombier | NE |
| CHCOM | Comano | TI |
| CHCMM | Commugny | VD |
| CHCON | Concise | VD |
| CHCFG | Confignon | GE |
| CHCHY | Conthey | VS |
| CHCTR | Contra | TI |
| CHCPA | Champagne | VD |
| CHCHP | Champery | VS |
| CHCRM | Charmoille | JU |
| CHVVS | Charrat | VS |
| CHCHO | Chateau-d'oex | VD |
| CHCAL | Chatelaine | GE |
| CHCSD | Chatel-st-denis | FR |
| CHCDB | Chavannes-de-bogis | VD |
| CHVPR | Chavannes-pres-renens | VD |
| CHCVY | Chavornay | VD |
| CHCBS | Chene-bougeries | GE |
| CHCBG | Chene-bourg | GE |
| CHCNX | Chernex | VD |
| CHCXL | Cheseaux-sur-lausanne | VD |
| CHCHS | Chesieres | VD |
| CHCHE | Chevenez | 22 |