| Canals to Mauldin (South Carolina) | 4,367.53 mi (7,028.86 km) |
| Canals to Maumee (Ohio) | 4,203.29 mi (6,764.54 km) |
| Canals to Maumelle (Arkansas) | 4,848.74 mi (7,803.29 km) |
| Canals to Mayagüez (Puerto Rico) | 4,189.82 mi (6,742.87 km) |
| Canals to Mayfield Heights (Ohio) | 4,103.45 mi (6,603.86 km) |
| Canals to Mays Chapel (Maryland) | 3,941.26 mi (6,342.84 km) |
| Canals to Maywood (California) | 6,009.33 mi (9,671.08 km) |
| Canals to Maywood (Illinois) | 4,381.90 mi (7,051.98 km) |
| Canals to McAlester (Oklahoma) | 5,002.48 mi (8,050.71 km) |
| Canals to McAllen (Texas) | 5,482.32 mi (8,822.95 km) |
| Canals to McCalla (Alabama) | 4,651.56 mi (7,485.96 km) |
| Canals to McComb (Mississippi) | 4,897.69 mi (7,882.07 km) |
| Canals to McDonough (Georgia) | 4,505.91 mi (7,251.55 km) |
| Canals to McFarland (California) | 5,965.53 mi (9,600.60 km) |
| Canals to McHenry (Illinois) | 4,386.16 mi (7,058.84 km) |
