| Mason City to Cordele (Georgia) | 928.59 mi (1,494.42 km) |
| Mason City to Corinth (Mississippi) | 619.65 mi (997.24 km) |
| Mason City to Corinth (Texas) | 722.33 mi (1,162.47 km) |
| Mason City to Cornelius (North Carolina) | 844.00 mi (1,358.29 km) |
| Mason City to Cornelius (Oregon) | 1,475.74 mi (2,374.98 km) |
| Mason City to Corning (New York) | 822.05 mi (1,322.97 km) |
| Mason City to Corona (California) | 1,458.09 mi (2,346.57 km) |
| Mason City to Coronado (California) | 1,485.93 mi (2,391.38 km) |
| Mason City to Corpus Christi (Texas) | 1,090.89 mi (1,755.62 km) |
| Mason City to Corsicana (Texas) | 785.05 mi (1,263.42 km) |
| Mason City to Cortland (New York) | 861.22 mi (1,385.99 km) |
| Mason City to Corvallis (Oregon) | 1,493.20 mi (2,403.07 km) |
| Mason City to Coshocton (Ohio) | 618.00 mi (994.58 km) |
| Mason City to Costa Mesa (California) | 1,482.22 mi (2,385.41 km) |
| Mason City to Coto de Caza (California) | 1,469.25 mi (2,364.53 km) |
