| Effingham to Clemson (South Carolina) | 440.84 mi (709.46 km) |
| Effingham to Clermont (Florida) | 829.33 mi (1,334.67 km) |
| Effingham to Cleveland (Mississippi) | 390.67 mi (628.72 km) |
| Effingham to Cleveland (Ohio) | 396.80 mi (638.59 km) |
| Effingham to Cleveland (Tennessee) | 339.25 mi (545.97 km) |
| Effingham to Cleveland Heights (Ohio) | 403.31 mi (649.07 km) |
| Effingham to Cliffside Park (New Jersey) | 779.10 mi (1,253.84 km) |
| Effingham to Clifton (Colorado) | 1,065.42 mi (1,714.63 km) |
| Effingham to Clifton (New Jersey) | 770.46 mi (1,239.93 km) |
| Effingham to Clinton (Iowa) | 208.05 mi (334.82 km) |
| Effingham to Clinton (Maryland) | 625.93 mi (1,007.34 km) |
| Effingham to Clinton (Mississippi) | 478.14 mi (769.49 km) |
| Effingham to Clinton (Utah) | 1,246.20 mi (2,005.57 km) |
| Effingham to Clive (Iowa) | 325.48 mi (523.81 km) |
| Effingham to Cloquet (Minnesota) | 561.61 mi (903.83 km) |
