World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Oglesby | USOGY | United States of America (the) |
| Ognina | ITOGN | Italy |
| Ogomori | JPOGM | Japan |
| Oguandjo Terminal | GAOGU | Gabon |
| Ogunquit | USYOQ | United States of America (the) |
| Ohama, Ehime | JPOHM | Japan |
| Ohama, Kagawa | JPOHA | Japan |
| Ohama, Kagoshima | JPKHM | Japan |
| Ohama, Okayama | JPOOH | Japan |
| Ohama, Tottori | JPOMX | Japan |