World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Colonia Mariano Roque Alonso | PYMRA | Paraguay |
| Colos | PTCLS | Portugal |
| Columbia | USYNJ | United States of America (the) |
| Columbia Falls | USYCU | United States of America (the) |
| Colwyn Bay (Bae Colwyn) | GBCYY | United Kingdom |
| Comandante Ferraz | AQCFZ | Antarctica |
| Combaillaux | FRRZW | France |
| Combe Martin | GBCBM | United Kingdom |
| Combertault | FRJMQ | France |
| Come By Chance | CACBC | Canada |