| Round Rock to Central Point (Oregon) | 1,615.27 mi (2,599.52 km) |
| Round Rock to Centralia (Illinois) | 735.18 mi (1,183.16 km) |
| Round Rock to Centralia (Washington) | 1,752.04 mi (2,819.64 km) |
| Round Rock to Centreville (Virginia) | 1,280.70 mi (2,061.09 km) |
| Round Rock to Ceres (California) | 1,415.54 mi (2,278.09 km) |
| Round Rock to Cerritos (California) | 1,212.99 mi (1,952.12 km) |
| Round Rock to Chalco (Nebraska) | 741.09 mi (1,192.68 km) |
| Round Rock to Chalmette (Louisiana) | 461.21 mi (742.24 km) |
| Round Rock to Chambersburg (Pennsylvania) | 1,298.44 mi (2,089.64 km) |
| Round Rock to Chamblee (Georgia) | 814.25 mi (1,310.42 km) |
| Round Rock to Champaign (Illinois) | 846.87 mi (1,362.91 km) |
| Round Rock to Champlin (Minnesota) | 1,037.86 mi (1,670.28 km) |
| Round Rock to Chandler (Arizona) | 852.90 mi (1,372.62 km) |
| Round Rock to Chanhassen (Minnesota) | 1,014.66 mi (1,632.94 km) |
| Round Rock to Channahon (Illinois) | 916.90 mi (1,475.61 km) |
