| Mason City to Crawfordsville (Indiana) | 389.82 mi (627.35 km) |
| Mason City to Crest Hill (Illinois) | 281.58 mi (453.16 km) |
| Mason City to Crestview (Florida) | 930.78 mi (1,497.95 km) |
| Mason City to Crestwood (Illinois) | 297.26 mi (478.39 km) |
| Mason City to Crestwood (Missouri) | 349.80 mi (562.94 km) |
| Mason City to Creve Coeur (Missouri) | 341.74 mi (549.98 km) |
| Mason City to Crofton (Maryland) | 904.73 mi (1,456.03 km) |
| Mason City to Crossville (Tennessee) | 660.14 mi (1,062.39 km) |
| Mason City to Crowley (Louisiana) | 894.61 mi (1,439.74 km) |
| Mason City to Crowley (Texas) | 764.50 mi (1,230.35 km) |
| Mason City to Crown Point (Indiana) | 322.26 mi (518.63 km) |
| Mason City to Crystal (Minnesota) | 130.76 mi (210.44 km) |
| Mason City to Crystal Lake (Illinois) | 254.97 mi (410.34 km) |
| Mason City to Cudahy (California) | 1,484.00 mi (2,388.27 km) |
| Mason City to Cudahy (Wisconsin) | 269.72 mi (434.08 km) |
