| Round Rock to Cedar Park (Texas) | 9.33 mi (15.01 km) |
| Round Rock to Cedar Rapids (Iowa) | 857.29 mi (1,379.67 km) |
| Round Rock to Cedarburg (Wisconsin) | 1,030.05 mi (1,657.70 km) |
| Round Rock to Celebration (Florida) | 980.90 mi (1,578.60 km) |
| Round Rock to Celina (Ohio) | 1,009.11 mi (1,624.01 km) |
| Round Rock to Celina (Texas) | 199.30 mi (320.74 km) |
| Round Rock to Centennial (Colorado) | 746.57 mi (1,201.49 km) |
| Round Rock to Center Point (Alabama) | 677.42 mi (1,090.20 km) |
| Round Rock to Centereach (New York) | 1,545.91 mi (2,487.89 km) |
| Round Rock to Centerton (Arkansas) | 447.04 mi (719.44 km) |
| Round Rock to Centerville (Ohio) | 988.08 mi (1,590.16 km) |
| Round Rock to Centerville (Utah) | 1,071.03 mi (1,723.66 km) |
| Round Rock to Central (Louisiana) | 394.32 mi (634.59 km) |
| Round Rock to Central Falls (Rhode Island) | 1,652.19 mi (2,658.95 km) |
| Round Rock to Central Islip (New York) | 1,538.40 mi (2,475.82 km) |
