| Rock Island to Jeffersontown (Kentucky) | 348.62 mi (561.05 km) |
| Rock Island to Jeffersonville (Indiana) | 337.16 mi (542.60 km) |
| Rock Island to Jenison (Michigan) | 262.87 mi (423.05 km) |
| Rock Island to Jenks (Oklahoma) | 476.59 mi (767.00 km) |
| Rock Island to Jennings (Missouri) | 190.53 mi (306.63 km) |
| Rock Island to Jensen Beach (Florida) | 1,144.30 mi (1,841.57 km) |
| Rock Island to Jericho (New York) | 886.69 mi (1,427.00 km) |
| Rock Island to Jerome (Idaho) | 1,225.98 mi (1,973.02 km) |
| Rock Island to Jersey City (New Jersey) | 860.16 mi (1,384.29 km) |
| Rock Island to Jessup (Maryland) | 743.98 mi (1,197.32 km) |
| Rock Island to Johns Creek (Georgia) | 620.46 mi (998.53 km) |
| Rock Island to Johnson City (New York) | 753.52 mi (1,212.68 km) |
| Rock Island to Johnson City (Tennessee) | 565.31 mi (909.77 km) |
| Rock Island to Johnston (Iowa) | 163.03 mi (262.37 km) |
| Rock Island to Johnstown (Colorado) | 753.22 mi (1,212.19 km) |
