| Rockford to Clemson (South Carolina) | 622.76 mi (1,002.23 km) |
| Rockford to Clermont (Florida) | 1,033.67 mi (1,663.53 km) |
| Rockford to Cleveland (Mississippi) | 595.27 mi (958.00 km) |
| Rockford to Cleveland (Ohio) | 383.61 mi (617.36 km) |
| Rockford to Cleveland (Tennessee) | 538.57 mi (866.74 km) |
| Rockford to Cleveland Heights (Ohio) | 389.13 mi (626.24 km) |
| Rockford to Cliffside Park (New Jersey) | 784.91 mi (1,263.19 km) |
| Rockford to Clifton (Colorado) | 1,037.60 mi (1,669.85 km) |
| Rockford to Clifton (New Jersey) | 775.65 mi (1,248.29 km) |
| Rockford to Clinton (Iowa) | 66.89 mi (107.65 km) |
| Rockford to Clinton (Maryland) | 682.42 mi (1,098.25 km) |
| Rockford to Clinton (Mississippi) | 687.97 mi (1,107.18 km) |
| Rockford to Clinton (Utah) | 1,185.52 mi (1,907.91 km) |
| Rockford to Clive (Iowa) | 247.33 mi (398.03 km) |
| Rockford to Cloquet (Minnesota) | 351.51 mi (565.70 km) |
