| Rock Island to Ridgefield Park (New Jersey) | 861.27 mi (1,386.08 km) |
| Rock Island to Ridgeland (Mississippi) | 625.50 mi (1,006.64 km) |
| Rock Island to Ridgewood (New Jersey) | 855.25 mi (1,376.40 km) |
| Rock Island to Rifle (Colorado) | 911.39 mi (1,466.74 km) |
| Rock Island to Rincon (Georgia) | 816.70 mi (1,314.35 km) |
| Rock Island to Ringwood (New Jersey) | 845.77 mi (1,361.13 km) |
| Rock Island to Río Grande (Puerto Rico) | 2,161.57 mi (3,478.71 km) |
| Rock Island to Rio Grande City (Texas) | 1,143.18 mi (1,839.77 km) |
| Rock Island to Rio Linda (California) | 1,633.98 mi (2,629.64 km) |
| Rock Island to Rio Rancho (New Mexico) | 969.70 mi (1,560.58 km) |
| Rock Island to Rio Rico (Arizona) | 1,321.58 mi (2,126.88 km) |
| Rock Island to Ripon (California) | 1,637.73 mi (2,635.67 km) |
| Rock Island to River Edge (New Jersey) | 859.60 mi (1,383.39 km) |
| Rock Island to River Falls (Wisconsin) | 255.88 mi (411.79 km) |
| Rock Island to River Forest (Illinois) | 145.58 mi (234.28 km) |
