| Mason City to Central Point (Oregon) | 1,500.18 mi (2,414.30 km) |
| Mason City to Centralia (Illinois) | 384.05 mi (618.07 km) |
| Mason City to Centralia (Washington) | 1,467.79 mi (2,362.18 km) |
| Mason City to Centreville (Virginia) | 872.56 mi (1,404.25 km) |
| Mason City to Ceres (California) | 1,503.28 mi (2,419.30 km) |
| Mason City to Cerritos (California) | 1,482.06 mi (2,385.15 km) |
| Mason City to Chalco (Nebraska) | 202.64 mi (326.12 km) |
| Mason City to Chalmette (Louisiana) | 929.65 mi (1,496.13 km) |
| Mason City to Chambersburg (Pennsylvania) | 832.65 mi (1,340.02 km) |
| Mason City to Chamblee (Georgia) | 799.72 mi (1,287.02 km) |
| Mason City to Champaign (Illinois) | 329.55 mi (530.36 km) |
| Mason City to Champlin (Minnesota) | 139.99 mi (225.29 km) |
| Mason City to Chandler (Arizona) | 1,216.21 mi (1,957.29 km) |
| Mason City to Chanhassen (Minnesota) | 119.23 mi (191.89 km) |
| Mason City to Channahon (Illinois) | 279.24 mi (449.39 km) |
