| Mason City to Mitchell (South Dakota) | 245.78 mi (395.54 km) |
| Mason City to Mitchellville (Maryland) | 900.32 mi (1,448.93 km) |
| Mason City to Moberly (Missouri) | 260.80 mi (419.71 km) |
| Mason City to Mobile (Alabama) | 905.76 mi (1,457.69 km) |
| Mason City to Modesto (California) | 1,504.17 mi (2,420.72 km) |
| Mason City to Mokena (Illinois) | 293.75 mi (472.74 km) |
| Mason City to Moline (Illinois) | 179.98 mi (289.64 km) |
| Mason City to Moncks Corner (South Carolina) | 991.91 mi (1,596.33 km) |
| Mason City to Monfort Heights (Ohio) | 523.85 mi (843.05 km) |
| Mason City to Monmouth (Oregon) | 1,488.58 mi (2,395.64 km) |
| Mason City to Monroe (Georgia) | 823.74 mi (1,325.69 km) |
| Mason City to Monroe (Louisiana) | 737.00 mi (1,186.09 km) |
| Mason City to Monroe (Michigan) | 506.62 mi (815.33 km) |
| Mason City to Monroe (North Carolina) | 879.26 mi (1,415.03 km) |
| Mason City to Monroe (Ohio) | 524.65 mi (844.34 km) |
