| Hackettstown to Carlsbad (California) | 2,378.96 mi (3,828.56 km) |
| Hackettstown to Carlsbad (New Mexico) | 1,722.54 mi (2,772.16 km) |
| Hackettstown to Carmel (Indiana) | 598.29 mi (962.86 km) |
| Hackettstown to Carmichael (California) | 2,446.07 mi (3,936.57 km) |
| Hackettstown to Carney (Maryland) | 134.41 mi (216.31 km) |
| Hackettstown to Carnot-Moon (Pennsylvania) | 283.41 mi (456.10 km) |
| Hackettstown to Carol Stream (Illinois) | 692.91 mi (1,115.14 km) |
| Hackettstown to Carolina (Puerto Rico) | 1,637.29 mi (2,634.97 km) |
| Hackettstown to Carolina Forest (South Carolina) | 538.67 mi (866.91 km) |
| Hackettstown to Carpentersville (Illinois) | 701.60 mi (1,129.11 km) |
| Hackettstown to Carpinteria (California) | 2,458.61 mi (3,956.76 km) |
| Hackettstown to Carrboro (North Carolina) | 411.23 mi (661.81 km) |
| Hackettstown to Carroll (Iowa) | 1,038.58 mi (1,671.44 km) |
| Hackettstown to Carrollton (Georgia) | 754.69 mi (1,214.55 km) |
| Hackettstown to Carrollton (Texas) | 1,330.06 mi (2,140.52 km) |
