| Rock Island to Cottage Grove (Minnesota) | 259.64 mi (417.84 km) |
| Rock Island to Cottage Grove (Oregon) | 1,647.92 mi (2,652.07 km) |
| Rock Island to Cottage Lake (Washington) | 1,596.34 mi (2,569.07 km) |
| Rock Island to Cottonwood (Arizona) | 1,250.39 mi (2,012.31 km) |
| Rock Island to Cottonwood Heights (Utah) | 1,105.23 mi (1,778.70 km) |
| Rock Island to Council Bluffs (Iowa) | 273.70 mi (440.48 km) |
| Rock Island to Country Club (Florida) | 1,222.53 mi (1,967.48 km) |
| Rock Island to Country Club Hills (Illinois) | 147.97 mi (238.14 km) |
| Rock Island to Country Walk (Florida) | 1,238.30 mi (1,992.86 km) |
| Rock Island to Covina (California) | 1,567.74 mi (2,523.04 km) |
| Rock Island to Covington (Georgia) | 656.40 mi (1,056.38 km) |
| Rock Island to Covington (Kentucky) | 361.35 mi (581.54 km) |
| Rock Island to Covington (Louisiana) | 759.71 mi (1,222.64 km) |
| Rock Island to Covington (Washington) | 1,596.05 mi (2,568.60 km) |
| Rock Island to Cranston (Rhode Island) | 984.61 mi (1,584.57 km) |
