| Mason City to Candler-McAfee (Georgia) | 809.64 mi (1,303.00 km) |
| Mason City to Caño Martin Peña (Puerto Rico) | 2,327.27 mi (3,745.38 km) |
| Mason City to Cañon City (Colorado) | 706.90 mi (1,137.64 km) |
| Mason City to Canóvanas (Puerto Rico) | 2,336.57 mi (3,760.35 km) |
| Mason City to Canton (Georgia) | 772.94 mi (1,243.93 km) |
| Mason City to Canton (Illinois) | 241.49 mi (388.65 km) |
| Mason City to Canton (Mississippi) | 749.05 mi (1,205.48 km) |
| Mason City to Canton (Ohio) | 628.29 mi (1,011.13 km) |
| Mason City to Canyon (Texas) | 731.56 mi (1,177.33 km) |
| Mason City to Canyon Lake (California) | 1,450.22 mi (2,333.90 km) |
| Mason City to Canyon Lake (Texas) | 958.66 mi (1,542.81 km) |
| Mason City to Cape Coral (Florida) | 1,302.38 mi (2,095.98 km) |
| Mason City to Cape Girardeau (Missouri) | 446.60 mi (718.74 km) |
| Mason City to Carbondale (Illinois) | 429.17 mi (690.69 km) |
| Mason City to Carlisle (Pennsylvania) | 848.86 mi (1,366.10 km) |
