| Romeoville to Crawfordsville (Indiana) | 126.50 mi (203.58 km) |
| Romeoville to Crest Hill (Illinois) | 4.16 mi (6.70 km) |
| Romeoville to Crestview (Florida) | 756.75 mi (1,217.87 km) |
| Romeoville to Crestwood (Illinois) | 18.61 mi (29.95 km) |
| Romeoville to Crestwood (Missouri) | 244.19 mi (392.99 km) |
| Romeoville to Creve Coeur (Missouri) | 239.60 mi (385.60 km) |
| Romeoville to Crofton (Maryland) | 627.60 mi (1,010.02 km) |
| Romeoville to Crossville (Tennessee) | 425.73 mi (685.14 km) |
| Romeoville to Crowley (Louisiana) | 823.83 mi (1,325.83 km) |
| Romeoville to Crowley (Texas) | 806.19 mi (1,297.43 km) |
| Romeoville to Crown Point (Indiana) | 41.80 mi (67.27 km) |
| Romeoville to Crystal (Minnesota) | 353.78 mi (569.36 km) |
| Romeoville to Crystal Lake (Illinois) | 43.29 mi (69.66 km) |
| Romeoville to Cudahy (California) | 1,715.64 mi (2,761.06 km) |
| Romeoville to Cudahy (Wisconsin) | 91.65 mi (147.49 km) |
