| Mason City to Cloverleaf (Texas) | 929.53 mi (1,495.93 km) |
| Mason City to Cloverly (Maryland) | 886.48 mi (1,426.65 km) |
| Mason City to Clovis (California) | 1,461.31 mi (2,351.76 km) |
| Mason City to Clovis (New Mexico) | 806.17 mi (1,297.40 km) |
| Mason City to Clute (Texas) | 983.40 mi (1,582.62 km) |
| Mason City to Coachella (California) | 1,396.94 mi (2,248.17 km) |
| Mason City to Coalinga (California) | 1,514.24 mi (2,436.94 km) |
| Mason City to Coamo (Puerto Rico) | 2,334.68 mi (3,757.31 km) |
| Mason City to Coatesville (Pennsylvania) | 922.79 mi (1,485.09 km) |
| Mason City to Cockeysville (Maryland) | 894.78 mi (1,440.00 km) |
| Mason City to Cocoa (Florida) | 1,232.56 mi (1,983.62 km) |
| Mason City to Cocoa Beach (Florida) | 1,239.86 mi (1,995.37 km) |
| Mason City to Coconut Creek (Florida) | 1,376.36 mi (2,215.03 km) |
| Mason City to Coeur d'Alene (Idaho) | 1,181.43 mi (1,901.33 km) |
| Mason City to Cohoes (New York) | 983.70 mi (1,583.12 km) |
