World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Isaccea | ROISC | Romania |
| Isafjørdur - høfn | ISISA | Iceland |
| Isahaya | JPISY | Japan |
| Ischia | ITISH | Italy |
| Isdemir | TRIDM | Türkiye |
| Ise | JPISE | Japan |
| Iseki | JPISK | Japan |
| Isfahan | IRIFN | Iran, Islamic Republic of |
| Ishiba | JPISB | Japan |
| Ishida | JPISD | Japan |