World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Clara City | USZCC | United States of America (the) |
| Clare | AUSCL | Australia |
| Clare | USQAI | United States of America (the) |
| Clare Island | IECLD | Ireland |
| Clarecastle | IECLC | Ireland |
| Claremont | AUCLM | Australia |
| Claremont | USCO3 | United States of America (the) |
| Clarence River | AUCLR | Australia |
| Clarendon | AUCDN | Australia |
| Clarendon | USRNN | United States of America (the) |