| Hackettstown to Joliet (Illinois) | 693.66 mi (1,116.33 km) |
| Hackettstown to Jonesboro (Arkansas) | 925.15 mi (1,488.89 km) |
| Hackettstown to Joplin (Missouri) | 1,086.24 mi (1,748.14 km) |
| Hackettstown to Joppatowne (Maryland) | 127.82 mi (205.71 km) |
| Hackettstown to Juana Díaz (Puerto Rico) | 1,651.01 mi (2,657.04 km) |
| Hackettstown to Junction City (Kansas) | 1,170.45 mi (1,883.66 km) |
| Hackettstown to Juneau (Alaska) | 2,805.53 mi (4,515.07 km) |
| Hackettstown to Jupiter (Florida) | 1,008.84 mi (1,623.57 km) |
| Hackettstown to Jupiter Farms (Florida) | 1,010.51 mi (1,626.27 km) |
| Hackettstown to Jurupa Valley (California) | 2,363.28 mi (3,803.33 km) |
| Hackettstown to Justice (Illinois) | 677.41 mi (1,090.18 km) |
| Hackettstown to Kahului (Hawaii) | 4,862.40 mi (7,825.28 km) |
| Hackettstown to Kailua (Hawaii) | 4,906.03 mi (7,895.49 km) |
| Hackettstown to Kalamazoo (Michigan) | 564.57 mi (908.59 km) |
| Hackettstown to Kalispell (Montana) | 1,987.09 mi (3,197.91 km) |
