World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Marans | FRMRN | France |
| Maransart | BEWBR | Belgium |
| Maratea | ITTEA | Italy |
| Marathokampos Samou | GRMKP | Greece |
| Marathon | CAMAR | Canada |
| Marau Sound, Guadalcanal Is | SBRUS | Solomon Islands |
| Marbach an der Donau | ATMAB | Austria |
| Marbæk Havn | DKMRB | Denmark |
| Marblehead | USMH2 | United States of America (the) |
| Marcardsmoor | DEMRM | Germany |