| Effingham to Clarksdale (Mississippi) | 358.32 mi (576.66 km) |
| Effingham to Clarkston (Georgia) | 437.95 mi (704.81 km) |
| Effingham to Clarksville (Indiana) | 159.87 mi (257.28 km) |
| Effingham to Clarksville (Tennessee) | 188.22 mi (302.91 km) |
| Effingham to Clawson (Michigan) | 367.87 mi (592.03 km) |
| Effingham to Clay (Alabama) | 390.07 mi (627.76 km) |
| Effingham to Clayton (California) | 1,795.82 mi (2,890.09 km) |
| Effingham to Clayton (Missouri) | 101.20 mi (162.86 km) |
| Effingham to Clayton (North Carolina) | 603.43 mi (971.13 km) |
| Effingham to Clayton (Ohio) | 230.93 mi (371.65 km) |
| Effingham to Clearfield (Utah) | 1,244.09 mi (2,002.17 km) |
| Effingham to Clearlake (California) | 1,818.15 mi (2,926.03 km) |
| Effingham to Clearwater (Florida) | 838.37 mi (1,349.22 km) |
| Effingham to Cleburne (Texas) | 681.63 mi (1,096.98 km) |
| Effingham to Clemmons (North Carolina) | 495.15 mi (796.87 km) |
