| Rockford to Jacksonville (North Carolina) | 816.57 mi (1,314.15 km) |
| Rockford to Jacksonville (Texas) | 788.50 mi (1,268.96 km) |
| Rockford to Jacksonville Beach (Florida) | 930.34 mi (1,497.24 km) |
| Rockford to James Island (South Carolina) | 825.50 mi (1,328.51 km) |
| Rockford to Jamestown (New York) | 503.02 mi (809.54 km) |
| Rockford to Jamestown (North Dakota) | 571.75 mi (920.15 km) |
| Rockford to Janesville (Wisconsin) | 29.53 mi (47.53 km) |
| Rockford to Jasmine Estates (Florida) | 1,028.98 mi (1,655.99 km) |
| Rockford to Jasper (Alabama) | 589.08 mi (948.04 km) |
| Rockford to Jasper (Indiana) | 289.59 mi (466.05 km) |
| Rockford to Jefferson (Georgia) | 634.39 mi (1,020.95 km) |
| Rockford to Jefferson (Louisiana) | 851.92 mi (1,371.03 km) |
| Rockford to Jefferson City (Missouri) | 303.05 mi (487.71 km) |
| Rockford to Jefferson Hills (Pennsylvania) | 492.95 mi (793.33 km) |
| Rockford to Jefferson Valley-Yorktown (New York) | 787.93 mi (1,268.05 km) |
