World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Culkein | GBCKN | United Kingdom |
| Culkein/Drumbeg | GBCLM | United Kingdom |
| Cullen | GBCUN | United Kingdom |
| Cullivoe, Yell | GBCUV | United Kingdom |
| Cumana | VECUM | Venezuela (Bolivarian Republic of) |
| Cumberland | USHXD | United States of America (the) |
| Cumberland Bay | CACUM | Canada |
| Cumberland City | USUDC | United States of America (the) |
| Cumbrae Slip, Great Cumbrae | GBCMS | United Kingdom |
| Cumbraes | GBCUM | United Kingdom |