| Code | Name | Region |
|---|---|---|
| ROCND | Constanta | CT |
| ROCOB | Corabia | OT |
| ROCRB | Corbeanca | |
| ROCCV | Corcova | MH |
| ROCNI | Cornesti | MM |
| ROCNU | Cornetu, Ilfov | |
| ROCSU | Cornu De Sus | PH |
| ROCLU | Cornu Luncii | SV |
| ROCOR | Corunca | MS |
| ROCOS | Cosoveni | |
| ROCSS | Costisa | NT |
| ROCOV | Covasna | CV |
| ROCRA | Craiova | |
| ROCRV | Craiova | DJ |
| ROCNO | Chirnogi | |
| ROCHN | Chiscani | BR |
| ROCHI | Chiselet | CL |
| ROCSO | Chisoda | TM |
| ROCTA | Chitila | B |
| RORMV | Ciacova | TM |
| ROCNC | Cilnic, Gorj | GJ |
| ROCPT | Cimpenita | MS |
| ROCLG | Cimpulung | AG |
| ROCPG | Cimpulung La Tisa | MM |
| ROCBV | Cincsor | BV |
| ROCIO | Ciorogarla | IF |
| ROCUR | Ciucurova | TL |
| ROCIU | Ciumani | HD |
| ROCBD | Ciumbrud | AB |
| ROCCI | Clinceni | B |
| ROCLJ | Cluj-napoca | |
| ROCCP | Cocorastii-capli | PH |
| ROCLA | Codlea | BV |
| ROCBI | Colibasi | AG |
| ROCTI | Campia Turzii | |
| ROCAM | Campina | PH |
| ROCMP | Campulung Moldovenesc | SV |
| RORZD | Campulung Muscel | |
| ROCRR | Cap Rosu | PH |
| ROCCL | Caracal | |
| ROCSB | Caransebes | |
| ROCCA | Carcea | |
| ROCAR | Carei | |
| ROCAT | Catanele | AG |
| ROCAC | Catcau | CJ |
| ROCTC | Cateasca | AG |
| ROCAV | Cavadinesti | GL |
| ROPTR | Cepturasu | BZ |
| ROCRU | Cerasu | PH |
| ROCEV | Cernavoda | IL |