| Janesville to Jacksonville (North Carolina) | 832.06 mi (1,339.07 km) |
| Janesville to Jacksonville (Texas) | 815.84 mi (1,312.97 km) |
| Janesville to Jacksonville Beach (Florida) | 954.79 mi (1,536.59 km) |
| Janesville to James Island (South Carolina) | 846.60 mi (1,362.46 km) |
| Janesville to Jamestown (New York) | 500.27 mi (805.11 km) |
| Janesville to Jamestown (North Dakota) | 556.46 mi (895.54 km) |
| Janesville to Jasmine Estates (Florida) | 1,055.30 mi (1,698.35 km) |
| Janesville to Jasper (Alabama) | 617.65 mi (994.00 km) |
| Janesville to Jasper (Indiana) | 315.88 mi (508.36 km) |
| Janesville to Jefferson (Georgia) | 658.92 mi (1,060.43 km) |
| Janesville to Jefferson (Louisiana) | 881.45 mi (1,418.55 km) |
| Janesville to Jefferson City (Missouri) | 329.25 mi (529.88 km) |
| Janesville to Jefferson Hills (Pennsylvania) | 497.90 mi (801.29 km) |
| Janesville to Jefferson Valley-Yorktown (New York) | 785.70 mi (1,264.46 km) |
| Janesville to Jeffersontown (Kentucky) | 358.55 mi (577.04 km) |
