| Mason City to Rosemont (California) | 1,497.98 mi (2,410.76 km) |
| Mason City to Rosemount (Minnesota) | 110.60 mi (178.00 km) |
| Mason City to Rosenberg (Texas) | 951.01 mi (1,530.50 km) |
| Mason City to Roseville (California) | 1,490.67 mi (2,399.00 km) |
| Mason City to Roseville (Michigan) | 521.60 mi (839.43 km) |
| Mason City to Roseville (Minnesota) | 129.00 mi (207.61 km) |
| Mason City to Rossmoor (California) | 1,485.60 mi (2,390.85 km) |
| Mason City to Rossville (Maryland) | 905.52 mi (1,457.30 km) |
| Mason City to Roswell (Georgia) | 789.24 mi (1,270.17 km) |
| Mason City to Roswell (New Mexico) | 911.55 mi (1,466.99 km) |
| Mason City to Round Lake (Illinois) | 264.33 mi (425.40 km) |
| Mason City to Round Lake Beach (Illinois) | 264.99 mi (426.45 km) |
| Mason City to Round Rock (Texas) | 905.97 mi (1,458.02 km) |
| Mason City to Rowland Heights (California) | 1,469.63 mi (2,365.13 km) |
| Mason City to Rowlett (Texas) | 729.99 mi (1,174.80 km) |
