World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Clydeport | GBCYP | United Kingdom |
| Clynderwen | GBCYD | United Kingdom |
| Co-operation Zone A (AU,ID) | XZOCA | Installations in International Waters |
| Coal Center | USQCN | United States of America (the) |
| Coal Harbour | CACAU | Canada |
| Coal Valley | USZCV | United States of America (the) |
| Coalfield | USZQZ | United States of America (the) |
| Coari | BRCAR | Brazil |
| Coastal Control Terminal | IECCT | Ireland |
| Coastline Private Port | MVCPP | Maldives |