| Hackettstown to Rockville (Maryland) | 173.72 mi (279.58 km) |
| Hackettstown to Rockville Centre (New York) | 63.51 mi (102.21 km) |
| Hackettstown to Rockwall (Texas) | 1,309.54 mi (2,107.50 km) |
| Hackettstown to Rocky Mount (North Carolina) | 374.03 mi (601.94 km) |
| Hackettstown to Rocky Point (New York) | 98.83 mi (159.06 km) |
| Hackettstown to Rocky River (Ohio) | 367.88 mi (592.04 km) |
| Hackettstown to Roessleville (New York) | 137.93 mi (221.98 km) |
| Hackettstown to Rogers (Arkansas) | 1,087.28 mi (1,749.82 km) |
| Hackettstown to Rogers (Minnesota) | 990.79 mi (1,594.53 km) |
| Hackettstown to Rohnert Park (California) | 2,522.51 mi (4,059.59 km) |
| Hackettstown to Rolla (Missouri) | 924.64 mi (1,488.07 km) |
| Hackettstown to Rolling Meadows (Illinois) | 687.90 mi (1,107.07 km) |
| Hackettstown to Roma (Texas) | 1,702.07 mi (2,739.22 km) |
| Hackettstown to Rome (Georgia) | 726.56 mi (1,169.28 km) |
| Hackettstown to Rome (New York) | 167.40 mi (269.41 km) |
