| Middlesex to Ridgeland (Mississippi) | 1,033.14 mi (1,662.69 km) |
| Middlesex to Ridgewood (New Jersey) | 34.73 mi (55.90 km) |
| Middlesex to Rifle (Colorado) | 1,750.57 mi (2,817.27 km) |
| Middlesex to Rincon (Georgia) | 683.15 mi (1,099.43 km) |
| Middlesex to Ringwood (New Jersey) | 38.62 mi (62.15 km) |
| Middlesex to Río Grande (Puerto Rico) | 1,617.55 mi (2,603.19 km) |
| Middlesex to Rio Grande City (Texas) | 1,701.12 mi (2,737.69 km) |
| Middlesex to Rio Linda (California) | 2,471.48 mi (3,977.47 km) |
| Middlesex to Rio Rancho (New Mexico) | 1,781.86 mi (2,867.62 km) |
| Middlesex to Rio Rico (Arizona) | 2,115.96 mi (3,405.31 km) |
| Middlesex to Ripon (California) | 2,476.67 mi (3,985.82 km) |
| Middlesex to River Edge (New Jersey) | 34.34 mi (55.26 km) |
| Middlesex to River Falls (Wisconsin) | 964.09 mi (1,551.56 km) |
| Middlesex to River Forest (Illinois) | 697.28 mi (1,122.16 km) |
| Middlesex to River Grove (Illinois) | 698.34 mi (1,123.86 km) |
