World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Douglas | IMDGS | Isle of Man |
| Douglas, Allegan | USDOG | United States of America (the) |
| Dougoula | GNPMT | Guinea |
| Douhudi | CNDHD | China |
| Doumen Pt | CNDOU | China |
| Douro | PTDOU | Portugal |
| Dover | GBDVR | United Kingdom |
| Downsville | USDWQ | United States of America (the) |
| Dønna | NODON | Norway |
| Drag | NODRG | Norway |