| Round Rock to Colton (California) | 1,171.97 mi (1,886.11 km) |
| Round Rock to Columbia (Illinois) | 692.41 mi (1,114.33 km) |
| Round Rock to Columbia (Maryland) | 1,318.62 mi (2,122.11 km) |
| Round Rock to Columbia (Missouri) | 655.65 mi (1,055.17 km) |
| Round Rock to Columbia (Pennsylvania) | 1,357.80 mi (2,185.16 km) |
| Round Rock to Columbia (South Carolina) | 1,007.34 mi (1,621.16 km) |
| Round Rock to Columbia (Tennessee) | 707.73 mi (1,138.98 km) |
| Round Rock to Columbia Heights (Minnesota) | 1,031.48 mi (1,660.01 km) |
| Round Rock to Columbine (Colorado) | 752.57 mi (1,211.14 km) |
| Round Rock to Columbus (Georgia) | 765.02 mi (1,231.18 km) |
| Round Rock to Columbus (Indiana) | 894.79 mi (1,440.02 km) |
| Round Rock to Columbus (Mississippi) | 579.71 mi (932.95 km) |
| Round Rock to Columbus (Nebraska) | 753.98 mi (1,213.41 km) |
| Round Rock to Columbus (Ohio) | 1,052.55 mi (1,693.91 km) |
| Round Rock to Commack (New York) | 1,535.44 mi (2,471.05 km) |
