World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Clearwater | USEWG | United States of America (the) |
| Clendenin | USIUH | United States of America (the) |
| Clermont | USERN | United States of America (the) |
| Clevedon | GBQZL | United Kingdom |
| Cleveland | AUCVN | Australia |
| Cleveland | CACVA | Canada |
| Cleveland | USCWX | United States of America (the) |
| Cleveland | USCLE | United States of America (the) |
| Clifden | IECLI | Ireland |
| Cliffe | GBCLF | United Kingdom |