World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Clarendon Heights | USZDC | United States of America (the) |
| Clarenville | CACLE | Canada |
| Clark's Harbour | CACLH | Canada |
| Clarke City | CACLC | Canada |
| Clarkesville | USCWW | United States of America (the) |
| Clarksburg | USCG4 | United States of America (the) |
| Clarkson | CACSN | Canada |
| Clatskanie | USYCK | United States of America (the) |
| Claveria/Aparri | PHCLV | Philippines (the) |
| Claves | USVXJ | United States of America (the) |