| Effingham to Carrollwood (Florida) | 839.07 mi (1,350.36 km) |
| Effingham to Carson (California) | 1,682.19 mi (2,707.22 km) |
| Effingham to Carson City (Nevada) | 1,663.54 mi (2,677.21 km) |
| Effingham to Carteret (New Jersey) | 765.54 mi (1,232.02 km) |
| Effingham to Cartersville (Georgia) | 400.50 mi (644.55 km) |
| Effingham to Carthage (Missouri) | 341.84 mi (550.14 km) |
| Effingham to Cary (Illinois) | 214.25 mi (344.80 km) |
| Effingham to Cary (North Carolina) | 581.08 mi (935.16 km) |
| Effingham to Casa de Oro-Mount Helix (California) | 1,641.68 mi (2,642.03 km) |
| Effingham to Casa Grande (Arizona) | 1,361.93 mi (2,191.81 km) |
| Effingham to Casas Adobes (Arizona) | 1,339.61 mi (2,155.90 km) |
| Effingham to Cascades (Virginia) | 598.37 mi (962.98 km) |
| Effingham to Casper (Wyoming) | 959.83 mi (1,544.69 km) |
| Effingham to Casselberry (Florida) | 832.37 mi (1,339.57 km) |
| Effingham to Castaic (California) | 1,686.73 mi (2,714.52 km) |
