| Middlesex to Darby (Pennsylvania) | 60.37 mi (97.15 km) |
| Middlesex to Dardenne Prairie (Missouri) | 871.08 mi (1,401.86 km) |
| Middlesex to Darien (Illinois) | 705.18 mi (1,134.88 km) |
| Middlesex to Davenport (Iowa) | 840.44 mi (1,352.56 km) |
| Middlesex to Davidson (North Carolina) | 491.81 mi (791.50 km) |
| Middlesex to Davie (Florida) | 1,055.11 mi (1,698.04 km) |
| Middlesex to Davis (California) | 2,489.50 mi (4,006.46 km) |
| Middlesex to Dayton (Nevada) | 2,363.46 mi (3,803.63 km) |
| Middlesex to Dayton (Ohio) | 514.69 mi (828.32 km) |
| Middlesex to Daytona Beach (Florida) | 869.66 mi (1,399.58 km) |
| Middlesex to De Pere (Wisconsin) | 740.05 mi (1,190.99 km) |
| Middlesex to De Witt (New York) | 188.18 mi (302.85 km) |
| Middlesex to Dearborn (Michigan) | 466.69 mi (751.06 km) |
| Middlesex to Dearborn Heights (Michigan) | 469.93 mi (756.28 km) |
| Middlesex to DeBary (Florida) | 895.26 mi (1,440.77 km) |
