World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Middleham | GBMDL | United Kingdom |
| Middlesbrough | GBMID | United Kingdom |
| Middletown | USM44 | United States of America (the) |
| Middlewich | GBMDW | United Kingdom |
| Midia | ROMID | Romania |
| Midland | AUMID | Australia |
| Midland | CAMID | Canada |
| Midsandur | ISHVR | Iceland |
| Midsund | NOMID | Norway |
| Midway Islands | UMMDY | United States Minor Outlying Islands |