| Round Rock to Kingsville (Texas) | 208.83 mi (336.09 km) |
| Round Rock to Kinston (North Carolina) | 1,207.21 mi (1,942.81 km) |
| Round Rock to Kirkland (Washington) | 1,757.53 mi (2,828.47 km) |
| Round Rock to Kirksville (Missouri) | 726.82 mi (1,169.70 km) |
| Round Rock to Kirkwood (Missouri) | 691.86 mi (1,113.44 km) |
| Round Rock to Kiryas Joel (New York) | 1,504.88 mi (2,421.86 km) |
| Round Rock to Kissimmee (Florida) | 988.94 mi (1,591.55 km) |
| Round Rock to Klamath Falls (Oregon) | 1,557.56 mi (2,506.65 km) |
| Round Rock to Knightdale (North Carolina) | 1,164.50 mi (1,874.08 km) |
| Round Rock to Knik-Fairview (Alaska) | 3,150.85 mi (5,070.81 km) |
| Round Rock to Knoxville (Tennessee) | 876.02 mi (1,409.82 km) |
| Round Rock to Kokomo (Indiana) | 943.08 mi (1,517.74 km) |
| Round Rock to Kuna (Idaho) | 1,361.61 mi (2,191.31 km) |
| Round Rock to Kyle (Texas) | 39.17 mi (63.04 km) |
| Round Rock to La Cañada Flintridge (California) | 1,222.89 mi (1,968.05 km) |
