| Rock Island to Cedar Park (Texas) | 857.73 mi (1,380.39 km) |
| Rock Island to Cedar Rapids (Iowa) | 66.09 mi (106.37 km) |
| Rock Island to Cedarburg (Wisconsin) | 183.00 mi (294.52 km) |
| Rock Island to Celebration (Florida) | 1,041.98 mi (1,676.90 km) |
| Rock Island to Celina (Ohio) | 320.09 mi (515.14 km) |
| Rock Island to Celina (Texas) | 658.12 mi (1,059.14 km) |
| Rock Island to Centennial (Colorado) | 760.36 mi (1,223.69 km) |
| Rock Island to Center Point (Alabama) | 581.11 mi (935.21 km) |
| Rock Island to Centereach (New York) | 909.63 mi (1,463.90 km) |
| Rock Island to Centerton (Arkansas) | 405.72 mi (652.95 km) |
| Rock Island to Centerville (Ohio) | 360.88 mi (580.78 km) |
| Rock Island to Centerville (Utah) | 1,105.28 mi (1,778.77 km) |
| Rock Island to Central (Louisiana) | 754.27 mi (1,213.89 km) |
| Rock Island to Central Falls (Rhode Island) | 988.60 mi (1,591.00 km) |
| Rock Island to Central Islip (New York) | 904.68 mi (1,455.95 km) |
