World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Metz | FRMZM | France |
| Meulaboh, Sumatra | IDMEQ | Indonesia |
| Mevagissey | GBMVG | United Kingdom |
| Mexico | USXXX | United States of America (the) |
| Mezen | RUMEZ | Russian Federation (the) |
| Mézières-sur-Seine | FRMZS | France |
| Mézoargues | FRWQA | France |
| Mgarr, Gozo | MTMGZ | Malta |
| Miami | USMIA | United States of America (the) |
| Miami Beach | USIYH | United States of America (the) |