| Rockville to River Grove (Illinois) | 594.06 mi (956.05 km) |
| Rockville to River Ridge (Louisiana) | 973.13 mi (1,566.09 km) |
| Rockville to Riverbank (California) | 2,349.57 mi (3,781.27 km) |
| Rockville to Riverdale (Georgia) | 555.10 mi (893.35 km) |
| Rockville to Riverdale (Illinois) | 579.02 mi (931.84 km) |
| Rockville to Riverside (California) | 2,244.22 mi (3,611.72 km) |
| Rockville to Riverside (Ohio) | 374.81 mi (603.20 km) |
| Rockville to Riverton (Utah) | 1,838.37 mi (2,958.57 km) |
| Rockville to Riverton (Wyoming) | 1,641.50 mi (2,641.73 km) |
| Rockville to Riverview (Florida) | 832.29 mi (1,339.44 km) |
| Rockville to Riverview (Michigan) | 381.74 mi (614.35 km) |
| Rockville to Riviera Beach (Florida) | 866.54 mi (1,394.56 km) |
| Rockville to Riviera Beach (Maryland) | 34.19 mi (55.02 km) |
| Rockville to Roanoke (Virginia) | 196.77 mi (316.66 km) |
| Rockville to Roanoke Rapids (North Carolina) | 184.26 mi (296.55 km) |
