| Middlesex to Rockville (Maryland) | 174.48 mi (280.79 km) |
| Middlesex to Rockville Centre (New York) | 45.67 mi (73.51 km) |
| Middlesex to Rockwall (Texas) | 1,320.05 mi (2,124.42 km) |
| Middlesex to Rocky Mount (North Carolina) | 365.13 mi (587.62 km) |
| Middlesex to Rocky Point (New York) | 85.61 mi (137.78 km) |
| Middlesex to Rocky River (Ohio) | 388.05 mi (624.51 km) |
| Middlesex to Roessleville (New York) | 151.10 mi (243.17 km) |
| Middlesex to Rogers (Arkansas) | 1,100.74 mi (1,771.47 km) |
| Middlesex to Rogers (Minnesota) | 1,014.22 mi (1,632.23 km) |
| Middlesex to Rohnert Park (California) | 2,543.26 mi (4,092.98 km) |
| Middlesex to Rolla (Missouri) | 939.42 mi (1,511.85 km) |
| Middlesex to Rolling Meadows (Illinois) | 708.58 mi (1,140.35 km) |
| Middlesex to Roma (Texas) | 1,708.08 mi (2,748.89 km) |
| Middlesex to Rome (Georgia) | 729.68 mi (1,174.31 km) |
| Middlesex to Rome (New York) | 190.14 mi (306.01 km) |
