| Mason City to Rockville (Maryland) | 879.47 mi (1,415.36 km) |
| Mason City to Rockville Centre (New York) | 1,018.00 mi (1,638.31 km) |
| Mason City to Rockwall (Texas) | 728.41 mi (1,172.27 km) |
| Mason City to Rocky Mount (North Carolina) | 956.23 mi (1,538.90 km) |
| Mason City to Rocky Point (New York) | 1,048.30 mi (1,687.07 km) |
| Mason City to Rocky River (Ohio) | 590.79 mi (950.78 km) |
| Mason City to Roessleville (New York) | 980.01 mi (1,577.18 km) |
| Mason City to Rogers (Arkansas) | 474.73 mi (764.00 km) |
| Mason City to Rogers (Minnesota) | 142.04 mi (228.60 km) |
| Mason City to Rohnert Park (California) | 1,570.58 mi (2,527.60 km) |
| Mason City to Rolla (Missouri) | 367.31 mi (591.14 km) |
| Mason City to Rolling Meadows (Illinois) | 273.33 mi (439.89 km) |
| Mason City to Roma (Texas) | 1,201.31 mi (1,933.33 km) |
| Mason City to Rome (Georgia) | 749.74 mi (1,206.59 km) |
| Mason City to Rome (New York) | 890.47 mi (1,433.07 km) |
