| Hackettstown to Jacksonville (Texas) | 1,287.21 mi (2,071.57 km) |
| Hackettstown to Jacksonville Beach (Florida) | 818.31 mi (1,316.94 km) |
| Hackettstown to James Island (South Carolina) | 627.96 mi (1,010.61 km) |
| Hackettstown to Jamestown (New York) | 243.94 mi (392.58 km) |
| Hackettstown to Jamestown (North Dakota) | 1,254.18 mi (2,018.41 km) |
| Hackettstown to Janesville (Wisconsin) | 741.07 mi (1,192.63 km) |
| Hackettstown to Jasmine Estates (Florida) | 975.39 mi (1,569.73 km) |
| Hackettstown to Jasper (Alabama) | 836.11 mi (1,345.59 km) |
| Hackettstown to Jasper (Indiana) | 666.14 mi (1,072.05 km) |
| Hackettstown to Jefferson (Georgia) | 667.78 mi (1,074.69 km) |
| Hackettstown to Jefferson (Louisiana) | 1,142.18 mi (1,838.16 km) |
| Hackettstown to Jefferson City (Missouri) | 934.02 mi (1,503.16 km) |
| Hackettstown to Jefferson Hills (Pennsylvania) | 270.79 mi (435.79 km) |
| Hackettstown to Jefferson Valley-Yorktown (New York) | 62.26 mi (100.20 km) |
| Hackettstown to Jeffersontown (Kentucky) | 600.66 mi (966.66 km) |
