| Severn to McHenry (Illinois) | 645.59 mi (1,038.98 km) |
| Severn to McKeesport (Pennsylvania) | 186.87 mi (300.75 km) |
| Severn to McKinleyville (California) | 2,478.90 mi (3,989.40 km) |
| Severn to McKinney (Texas) | 1,183.94 mi (1,905.37 km) |
| Severn to McLean (Virginia) | 29.87 mi (48.07 km) |
| Severn to McMinnville (Oregon) | 2,383.82 mi (3,836.39 km) |
| Severn to McMinnville (Tennessee) | 552.28 mi (888.82 km) |
| Severn to McNair (Virginia) | 40.47 mi (65.13 km) |
| Severn to McPherson (Kansas) | 1,128.36 mi (1,815.92 km) |
| Severn to Mead Valley (California) | 2,265.33 mi (3,645.69 km) |
| Severn to Meadow Woods (Florida) | 790.05 mi (1,271.47 km) |
| Severn to Meadowbrook (Virginia) | 125.16 mi (201.43 km) |
| Severn to Meadville (Pennsylvania) | 251.18 mi (404.23 km) |
| Severn to Mebane (North Carolina) | 253.60 mi (408.13 km) |
| Severn to Mechanicsville (Virginia) | 110.24 mi (177.42 km) |
