World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Niigata | JPKIJ | Japan |
| Niigatahigashi | JPNIH | Japan |
| Niigatanishi | JPNIN | Japan |
| Niihama | JPIHA | Japan |
| Niijima | JPNIJ | Japan |
| Niikappu | JPXCA | Japan |
| Nijezijl | NLNZJ | Netherlands |
| Nijkerk | NLNKK | Netherlands |
| Nijlen | BENYL | Belgium |
| Nijmegen | NLNIJ | Netherlands |