| Portage to McHenry (Illinois) | 138.51 mi (222.90 km) |
| Portage to McKeesport (Pennsylvania) | 324.78 mi (522.68 km) |
| Portage to McKinleyville (California) | 1,974.65 mi (3,177.89 km) |
| Portage to McKinney (Texas) | 866.41 mi (1,394.35 km) |
| Portage to McLean (Virginia) | 494.46 mi (795.76 km) |
| Portage to McMinnville (Oregon) | 1,872.46 mi (3,013.43 km) |
| Portage to McMinnville (Tennessee) | 450.16 mi (724.47 km) |
| Portage to McNair (Virginia) | 484.08 mi (779.06 km) |
| Portage to McPherson (Kansas) | 688.17 mi (1,107.50 km) |
| Portage to Mead Valley (California) | 1,807.33 mi (2,908.62 km) |
| Portage to Meadow Woods (Florida) | 984.74 mi (1,584.78 km) |
| Portage to Meadowbrook (Virginia) | 541.95 mi (872.19 km) |
| Portage to Meadville (Pennsylvania) | 282.39 mi (454.47 km) |
| Portage to Mebane (North Carolina) | 541.03 mi (870.71 km) |
| Portage to Mechanicsville (Virginia) | 538.38 mi (866.44 km) |
