| Muscle Shoals to McHenry (Illinois) | 526.00 mi (846.51 km) |
| Muscle Shoals to McKeesport (Pennsylvania) | 575.56 mi (926.28 km) |
| Muscle Shoals to McKinleyville (California) | 2,019.17 mi (3,249.53 km) |
| Muscle Shoals to McKinney (Texas) | 528.22 mi (850.08 km) |
| Muscle Shoals to McLean (Virginia) | 645.55 mi (1,038.91 km) |
| Muscle Shoals to McMinnville (Oregon) | 1,997.23 mi (3,214.23 km) |
| Muscle Shoals to McMinnville (Tennessee) | 123.24 mi (198.34 km) |
| Muscle Shoals to McNair (Virginia) | 635.08 mi (1,022.07 km) |
| Muscle Shoals to McPherson (Kansas) | 609.86 mi (981.47 km) |
| Muscle Shoals to Mead Valley (California) | 1,687.68 mi (2,716.05 km) |
| Muscle Shoals to Meadow Woods (Florida) | 574.99 mi (925.36 km) |
| Muscle Shoals to Meadowbrook (Virginia) | 596.54 mi (960.04 km) |
| Muscle Shoals to Meadville (Pennsylvania) | 626.27 mi (1,007.89 km) |
| Muscle Shoals to Mebane (North Carolina) | 479.67 mi (771.95 km) |
| Muscle Shoals to Mechanicsville (Virginia) | 606.40 mi (975.91 km) |
