World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Dunapataj | HUDPA | Hungary |
| Dunaremete | HUDRE | Hungary |
| Dunaújváros | HUDUU | Hungary |
| Dunavecse | HUDVE | Hungary |
| Dunbar | GBDBR | United Kingdom |
| Dunbeath | GBDUE | United Kingdom |
| Duncannon/Saint Helens | IEDCN | Ireland |
| Dunchurch | GBDUC | United Kingdom |
| Dundalk | IEDDK | Ireland |
| Dundee | GBDUN | United Kingdom |