| Rockford to Cibolo (Texas) | 1,014.20 mi (1,632.19 km) |
| Rockford to Cicero (Illinois) | 72.82 mi (117.19 km) |
| Rockford to Cimarron Hills (Colorado) | 852.29 mi (1,371.63 km) |
| Rockford to Cincinnati (Ohio) | 321.51 mi (517.41 km) |
| Rockford to Cinco Ranch (Texas) | 941.78 mi (1,515.64 km) |
| Rockford to Circleville (Ohio) | 368.66 mi (593.30 km) |
| Rockford to Citrus (California) | 1,653.85 mi (2,661.62 km) |
| Rockford to Citrus Heights (California) | 1,701.08 mi (2,737.62 km) |
| Rockford to Citrus Park (Florida) | 1,045.88 mi (1,683.18 km) |
| Rockford to Claiborne (Louisiana) | 693.24 mi (1,115.66 km) |
| Rockford to Claremont (California) | 1,644.79 mi (2,647.03 km) |
| Rockford to Claremont (New Hampshire) | 849.82 mi (1,367.65 km) |
| Rockford to Claremore (Oklahoma) | 539.32 mi (867.95 km) |
| Rockford to Clarksburg (Maryland) | 651.58 mi (1,048.62 km) |
| Rockford to Clarksburg (West Virginia) | 501.06 mi (806.37 km) |
