| Hackettstown to Cullman (Alabama) | 802.76 mi (1,291.92 km) |
| Hackettstown to Culpeper (Virginia) | 235.83 mi (379.53 km) |
| Hackettstown to Culver City (California) | 2,411.49 mi (3,880.92 km) |
| Hackettstown to Cumberland (Maryland) | 223.38 mi (359.49 km) |
| Hackettstown to Cupertino (California) | 2,513.60 mi (4,045.24 km) |
| Hackettstown to Cutler Bay (Florida) | 1,101.94 mi (1,773.40 km) |
| Hackettstown to Cutlerville (Michigan) | 574.49 mi (924.56 km) |
| Hackettstown to Cuyahoga Falls (Ohio) | 349.64 mi (562.68 km) |
| Hackettstown to Cypress (California) | 2,398.19 mi (3,859.51 km) |
| Hackettstown to Cypress Gardens (Florida) | 969.31 mi (1,559.95 km) |
| Hackettstown to Cypress Lake (Florida) | 1,068.42 mi (1,719.46 km) |
| Hackettstown to D'Iberville (Mississippi) | 1,064.68 mi (1,713.44 km) |
| Hackettstown to Dakota Ridge (Colorado) | 1,592.92 mi (2,563.55 km) |
| Hackettstown to Dale City (Virginia) | 202.88 mi (326.51 km) |
| Hackettstown to Dallas (Georgia) | 728.63 mi (1,172.62 km) |
