| Round Rock to Crawfordsville (Indiana) | 893.60 mi (1,438.12 km) |
| Round Rock to Crest Hill (Illinois) | 929.84 mi (1,496.44 km) |
| Round Rock to Crestview (Florida) | 658.94 mi (1,060.46 km) |
| Round Rock to Crestwood (Illinois) | 945.75 mi (1,522.04 km) |
| Round Rock to Crestwood (Missouri) | 692.10 mi (1,113.83 km) |
| Round Rock to Creve Coeur (Missouri) | 695.60 mi (1,119.46 km) |
| Round Rock to Crofton (Maryland) | 1,323.17 mi (2,129.43 km) |
| Round Rock to Crossville (Tennessee) | 819.80 mi (1,319.34 km) |
| Round Rock to Crowley (Louisiana) | 315.98 mi (508.52 km) |
| Round Rock to Crowley (Texas) | 142.86 mi (229.90 km) |
| Round Rock to Crown Point (Indiana) | 946.51 mi (1,523.26 km) |
| Round Rock to Crystal (Minnesota) | 1,029.37 mi (1,656.61 km) |
| Round Rock to Crystal Lake (Illinois) | 959.60 mi (1,544.33 km) |
| Round Rock to Cudahy (California) | 1,220.15 mi (1,963.64 km) |
| Round Rock to Cudahy (Wisconsin) | 1,013.65 mi (1,631.31 km) |
