World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Ust-Kamchatsk | RUUKK | Russian Federation (the) |
| Ust'-Luga | RUULU | Russian Federation (the) |
| Ustí nad Labem | CZULN | Czechia |
| Ustica | ITUST | Italy |
| Ustka | PLUST | Poland |
| Ustronie Morskie | PLUMS | Poland |
| Usujiri | JPUSJ | Japan |
| Usuka | JPUKA | Japan |
| Usuki | JPUSK | Japan |
| Usuno | JPUSN | Japan |