| Hackettstown to Jeffersonville (Indiana) | 604.15 mi (972.29 km) |
| Hackettstown to Jenison (Michigan) | 582.95 mi (938.17 km) |
| Hackettstown to Jenks (Oklahoma) | 1,189.48 mi (1,914.28 km) |
| Hackettstown to Jennings (Missouri) | 831.64 mi (1,338.40 km) |
| Hackettstown to Jensen Beach (Florida) | 989.63 mi (1,592.66 km) |
| Hackettstown to Jericho (New York) | 67.30 mi (108.31 km) |
| Hackettstown to Jerome (Idaho) | 2,029.97 mi (3,266.92 km) |
| Hackettstown to Jersey City (New Jersey) | 40.70 mi (65.50 km) |
| Hackettstown to Jessup (Maryland) | 156.67 mi (252.14 km) |
| Hackettstown to Johns Creek (Georgia) | 696.86 mi (1,121.48 km) |
| Hackettstown to Johnson City (New York) | 105.59 mi (169.92 km) |
| Hackettstown to Johnson City (Tennessee) | 513.16 mi (825.86 km) |
| Hackettstown to Johnston (Iowa) | 981.07 mi (1,578.88 km) |
| Hackettstown to Johnstown (Colorado) | 1,572.75 mi (2,531.09 km) |
| Hackettstown to Johnstown (Pennsylvania) | 217.84 mi (350.59 km) |
