| Middlesex to Robertsville (New Jersey) | 19.55 mi (31.46 km) |
| Middlesex to Robinson (Texas) | 1,406.96 mi (2,264.28 km) |
| Middlesex to Robstown (Texas) | 1,583.75 mi (2,548.79 km) |
| Middlesex to Rochester (Michigan) | 468.16 mi (753.43 km) |
| Middlesex to Rochester (Minnesota) | 946.89 mi (1,523.88 km) |
| Middlesex to Rochester (New Hampshire) | 261.13 mi (420.25 km) |
| Middlesex to Rochester (New York) | 240.38 mi (386.85 km) |
| Middlesex to Rochester Hills (Michigan) | 469.55 mi (755.66 km) |
| Middlesex to Rock Hill (South Carolina) | 527.35 mi (848.69 km) |
| Middlesex to Rock Island (Illinois) | 839.36 mi (1,350.83 km) |
| Middlesex to Rock Springs (Wyoming) | 1,797.28 mi (2,892.44 km) |
| Middlesex to Rockford (Illinois) | 762.52 mi (1,227.16 km) |
| Middlesex to Rockledge (Florida) | 917.53 mi (1,476.62 km) |
| Middlesex to Rocklin (California) | 2,459.03 mi (3,957.42 km) |
| Middlesex to Rockport (Texas) | 1,545.38 mi (2,487.04 km) |
