| Convention States |
|
| Cook Islands |
|
| Cook Islands, Rarotonga |
|
| Corfu |
|
| Costa Rica |
|
| Costa Rica, Guanacaste |
|
| Cote d'Ivoire |
|
| Crete |
|
| Crete - Austrian Post Office |
|
| Croatia |
|
| Croatia - Kingdom of Serbs, Croats & Slovenes |
|
| Croatia, German Occupation of Zara In WWII |
|
| Croatia, Italian Occupation of Fiumano Kupa |
|
| Cuba |
|
| Curaçao |
|
| Cyprus |
|
| Cyprus- Revenue Stamps |
|
| Cyrenaica |
|
| Cyrenaica, British Administration |
|
| Cyrenaica, British Administration- Revenue Stamps |
|