World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Colchester | GBCOL | United Kingdom |
| Cold Spring Harbor | USHQ2 | United States of America (the) |
| Coldingham | GBCGB | United Kingdom |
| Coldstream | AUCST | Australia |
| Coldwater | USQIM | United States of America (the) |
| Coleraine | GBCLR | United Kingdom |
| Colesburg | USCU6 | United States of America (the) |
| Coley's Point | CACYP | Canada |
| Colfax | USOFX | United States of America (the) |
| Colinto | BZCOL | Belize |