| Middlesex to Bound Brook (New Jersey) | 2.01 mi (3.23 km) |
| Middlesex to Bountiful (Utah) | 1,941.51 mi (3,124.56 km) |
| Middlesex to Bourbonnais (Illinois) | 699.42 mi (1,125.61 km) |
| Middlesex to Bowie (Maryland) | 163.29 mi (262.79 km) |
| Middlesex to Bowling Green (Kentucky) | 688.79 mi (1,108.49 km) |
| Middlesex to Bowling Green (Ohio) | 480.21 mi (772.82 km) |
| Middlesex to Box Elder (South Dakota) | 1,472.24 mi (2,369.34 km) |
| Middlesex to Boynton Beach (Florida) | 1,021.71 mi (1,644.28 km) |
| Middlesex to Bozeman (Montana) | 1,859.96 mi (2,993.32 km) |
| Middlesex to Bradenton (Florida) | 1,014.26 mi (1,632.30 km) |
| Middlesex to Bradfordville (Florida) | 879.06 mi (1,414.71 km) |
| Middlesex to Bradley (Illinois) | 697.72 mi (1,122.87 km) |
| Middlesex to Bradley Gardens (New Jersey) | 8.75 mi (14.08 km) |
| Middlesex to Brainerd (Minnesota) | 1,061.88 mi (1,708.94 km) |
| Middlesex to Brambleton (Virginia) | 195.02 mi (313.85 km) |
