World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Marsund | FIMRS | Finland |
| Marsviken | SEMAN | Sweden |
| Martaban | MMMAR | Myanmar |
| Mártély | HUMTY | Hungary |
| Martinscica | HRMTA | Croatia |
| Martinskirchen | DEMSK | Germany |
| Martlesham Heath | GBMHT | United Kingdom |
| Martot | FRMQA | France |
| Martovce | SKMAT | Slovakia |
| Marudi, Sarawak | MYMUR | Malaysia |