| Mason City to McKeesport (Pennsylvania) | 714.41 mi (1,149.73 km) |
| Mason City to McKinleyville (California) | 1,582.91 mi (2,547.45 km) |
| Mason City to McKinney (Texas) | 712.43 mi (1,146.55 km) |
| Mason City to McLean (Virginia) | 881.49 mi (1,418.63 km) |
| Mason City to McMinnville (Oregon) | 1,484.33 mi (2,388.80 km) |
| Mason City to McMinnville (Tennessee) | 649.52 mi (1,045.30 km) |
| Mason City to McNair (Virginia) | 870.65 mi (1,401.17 km) |
| Mason City to McPherson (Kansas) | 404.15 mi (650.42 km) |
| Mason City to Mead Valley (California) | 1,445.77 mi (2,326.74 km) |
| Mason City to Meadow Woods (Florida) | 1,215.53 mi (1,956.21 km) |
| Mason City to Meadowbrook (Virginia) | 916.20 mi (1,474.48 km) |
| Mason City to Meadville (Pennsylvania) | 673.32 mi (1,083.61 km) |
| Mason City to Mebane (North Carolina) | 885.63 mi (1,425.28 km) |
| Mason City to Mechanicsville (Virginia) | 915.01 mi (1,472.56 km) |
| Mason City to Medford (Massachusetts) | 1,118.05 mi (1,799.32 km) |
