| Effingham to Cibolo (Texas) | 858.99 mi (1,382.41 km) |
| Effingham to Cicero (Illinois) | 192.75 mi (310.20 km) |
| Effingham to Cimarron Hills (Colorado) | 866.27 mi (1,394.13 km) |
| Effingham to Cincinnati (Ohio) | 216.78 mi (348.87 km) |
| Effingham to Cinco Ranch (Texas) | 766.79 mi (1,234.02 km) |
| Effingham to Circleville (Ohio) | 301.90 mi (485.86 km) |
| Effingham to Citrus (California) | 1,655.69 mi (2,664.57 km) |
| Effingham to Citrus Heights (California) | 1,750.75 mi (2,817.55 km) |
| Effingham to Citrus Park (Florida) | 836.97 mi (1,346.97 km) |
| Effingham to Claiborne (Louisiana) | 498.47 mi (802.22 km) |
| Effingham to Claremont (California) | 1,646.14 mi (2,649.21 km) |
| Effingham to Claremont (New Hampshire) | 890.43 mi (1,433.00 km) |
| Effingham to Claremore (Oklahoma) | 431.58 mi (694.57 km) |
| Effingham to Clarksburg (Maryland) | 604.13 mi (972.25 km) |
| Effingham to Clarksburg (West Virginia) | 440.52 mi (708.94 km) |
