| Rockville to Troy (Michigan) | 395.42 mi (636.37 km) |
| Rockville to Troy (Missouri) | 740.91 mi (1,192.37 km) |
| Rockville to Troy (New York) | 310.89 mi (500.33 km) |
| Rockville to Troy (Ohio) | 381.93 mi (614.65 km) |
| Rockville to Truckee (California) | 2,281.22 mi (3,671.26 km) |
| Rockville to Trujillo Alto (Puerto Rico) | 1,580.02 mi (2,542.79 km) |
| Rockville to Trumbull Center (Connecticut) | 257.28 mi (414.05 km) |
| Rockville to Trussville (Alabama) | 644.78 mi (1,037.67 km) |
| Rockville to Tualatin (Oregon) | 2,341.77 mi (3,768.72 km) |
| Rockville to Tuckahoe (Virginia) | 105.94 mi (170.49 km) |
| Rockville to Tucker (Georgia) | 532.97 mi (857.74 km) |
| Rockville to Tucson (Arizona) | 1,941.65 mi (3,124.78 km) |
| Rockville to Tucson Estates (Arizona) | 1,954.22 mi (3,145.01 km) |
| Rockville to Tucson Mountains (Arizona) | 1,948.72 mi (3,136.16 km) |
| Rockville to Tukwila (Washington) | 2,307.61 mi (3,713.75 km) |
