World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Mareb | YEMYN | Yemen |
| Marettimo | ITMMO | Italy |
| Mareuil-le-Port | FRULP | France |
| Mareuil-lès-Meaux | FRUMX | France |
| Margate | GBMGT | United Kingdom |
| Marghera | ITPMA | Italy |
| Margherita di Savoia | ITMDW | Italy |
| Margonin | PLMNN | Poland |
| Mariager | DKMRR | Denmark |
| Maribyrnong | AUMBY | Australia |