| Hackettstown to Clarksdale (Mississippi) | 975.71 mi (1,570.25 km) |
| Hackettstown to Clarkston (Georgia) | 709.31 mi (1,141.53 km) |
| Hackettstown to Clarksville (Indiana) | 607.82 mi (978.19 km) |
| Hackettstown to Clarksville (Tennessee) | 735.95 mi (1,184.39 km) |
| Hackettstown to Clawson (Michigan) | 444.73 mi (715.72 km) |
| Hackettstown to Clay (Alabama) | 813.84 mi (1,309.75 km) |
| Hackettstown to Clayton (California) | 2,492.74 mi (4,011.67 km) |
| Hackettstown to Clayton (Missouri) | 836.50 mi (1,346.22 km) |
| Hackettstown to Clayton (North Carolina) | 409.17 mi (658.49 km) |
| Hackettstown to Clayton (Ohio) | 504.68 mi (812.21 km) |
| Hackettstown to Clearfield (Utah) | 1,925.44 mi (3,098.69 km) |
| Hackettstown to Clearlake (California) | 2,505.48 mi (4,032.19 km) |
| Hackettstown to Clearwater (Florida) | 996.90 mi (1,604.35 km) |
| Hackettstown to Cleburne (Texas) | 1,378.25 mi (2,218.08 km) |
| Hackettstown to Clemmons (North Carolina) | 448.74 mi (722.18 km) |
