World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Marugame | JPMAR | Japan |
| Maruichibi | JPMAB | Japan |
| Maruiwa | JPMWA | Japan |
| Maruo | JPMRU | Japan |
| Marviken | SEMAV | Sweden |
| Mary's Harbour | CAYMH | Canada |
| Maryborough | AUMBH | Australia |
| Maryborough | AUSAD | Australia |
| Maryfield, Bressay | GBMRB | United Kingdom |
| Maryknoll | AUKLL | Australia |