World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Civrac-de-Blaye | FRXLZ | France |
| Ciwandan | IDCIW | Indonesia |
| Cixi | CNCIX | China |
| Clabecq | BECBQ | Belgium |
| Clachan, Raasay | GBRAS | United Kingdom |
| Clacton-on-Sea | GBCLS | United Kingdom |
| Clairvaux-d'Aveyron | FRVEY | France |
| Clallam Bay | USXMY | United States of America (the) |
| Clancy | USZCY | United States of America (the) |
| Claonaig | GBCLJ | United Kingdom |