| Mason City to Romeoville (Illinois) | 280.50 mi (451.43 km) |
| Mason City to Romulus (Michigan) | 503.22 mi (809.85 km) |
| Mason City to Ronkonkoma (New York) | 1,041.23 mi (1,675.70 km) |
| Mason City to Roosevelt (New York) | 1,020.45 mi (1,642.25 km) |
| Mason City to Rosamond (California) | 1,452.80 mi (2,338.06 km) |
| Mason City to Rosaryville (Maryland) | 904.55 mi (1,455.74 km) |
| Mason City to Roscoe (Illinois) | 218.29 mi (351.31 km) |
| Mason City to Rose Hill (Virginia) | 890.19 mi (1,432.63 km) |
| Mason City to Roseburg (Oregon) | 1,510.72 mi (2,431.27 km) |
| Mason City to Rosedale (California) | 1,483.33 mi (2,387.20 km) |
| Mason City to Rosedale (Maryland) | 904.76 mi (1,456.06 km) |
| Mason City to Roselle (Illinois) | 272.39 mi (438.37 km) |
| Mason City to Roselle (New Jersey) | 986.94 mi (1,588.32 km) |
| Mason City to Roselle Park (New Jersey) | 986.36 mi (1,587.39 km) |
| Mason City to Rosemead (California) | 1,475.21 mi (2,374.12 km) |
