World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Maarhuizen | NLMHU | Netherlands |
| Maarmorliik | GLMML | Greenland |
| Maasbracht | NLMSB | Netherlands |
| Maaseik | BEMSK | Belgium |
| Maasholm | DEMAO | Germany |
| Maasmechelen | BEMMN | Belgium |
| Maassluis | NLMSL | Netherlands |
| Maastricht | NLMST | Netherlands |
| Maasvlakte | NLMSV | Netherlands |
| Mabaguid | PHMGD | Philippines (the) |