| Effingham to Cullman (Alabama) | 354.42 mi (570.39 km) |
| Effingham to Culpeper (Virginia) | 569.61 mi (916.71 km) |
| Effingham to Culver City (California) | 1,685.56 mi (2,712.65 km) |
| Effingham to Cumberland (Maryland) | 523.96 mi (843.23 km) |
| Effingham to Cupertino (California) | 1,812.23 mi (2,916.51 km) |
| Effingham to Cutler Bay (Florida) | 1,050.33 mi (1,690.34 km) |
| Effingham to Cutlerville (Michigan) | 297.58 mi (478.91 km) |
| Effingham to Cuyahoga Falls (Ohio) | 397.11 mi (639.09 km) |
| Effingham to Cypress (California) | 1,671.06 mi (2,689.32 km) |
| Effingham to Cypress Gardens (Florida) | 863.14 mi (1,389.10 km) |
| Effingham to Cypress Lake (Florida) | 950.45 mi (1,529.61 km) |
| Effingham to D'Iberville (Mississippi) | 597.96 mi (962.32 km) |
| Effingham to Dakota Ridge (Colorado) | 885.20 mi (1,424.59 km) |
| Effingham to Dale City (Virginia) | 603.15 mi (970.67 km) |
| Effingham to Dallas (Georgia) | 414.36 mi (666.84 km) |
