World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Iwojima, Kagoshima | JPIOU | Japan |
| Iwojima, Nagasaki | JPIWT | Japan |
| Ixtapa/Zihuatanejo | MXZIH | Mexico |
| Ixtapaluca | MXZIP | Mexico |
| Iya | JPIYA | Japan |
| Iyo | JPIYO | Japan |
| Iyomishima | JPIYM | Japan |
| Izegem | BEIZG | Belgium |
| Izmail | UAIZM | Ukraine |
| Izmir | TRIZM | Türkiye |