World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Isle | USIVA | United States of America (the) |
| Isle of Grain | GBIOG | United Kingdom |
| Isle of Sheppey | GBIOS | United Kingdom |
| Isle of Whithorn | GBWHH | United Kingdom |
| Isle-Saint-Georges | FRISG | France |
| Isnäs | FIISN | Finland |
| Isola Asinara | ITISN | Italy |
| Isola del Giglio | ITIDG | Italy |
| Isola delle Femmine | ITIDF | Italy |
| Isola Santo Stefano | ITISS | Italy |