World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Michnov | CZMNV | Czechia |
| Mid Glamorgan | GBRGN | United Kingdom |
| Mid Yell | GBMYE | United Kingdom |
| Middelaar | NLMLA | Netherlands |
| Middelburg | NLMID | Netherlands |
| Middelfart | DKMID | Denmark |
| Middelharnis | NLMIH | Netherlands |
| Middelstum | NLMDU | Netherlands |
| Middenbeemster | NLMDI | Netherlands |
| Middle Island | USZIX | United States of America (the) |