| Middlesex to Dover (New Hampshire) | 259.26 mi (417.23 km) |
| Middlesex to Dover (New Jersey) | 21.74 mi (34.99 km) |
| Middlesex to Dover (Ohio) | 366.33 mi (589.54 km) |
| Middlesex to Downers Grove (Illinois) | 707.12 mi (1,138.00 km) |
| Middlesex to Downey (California) | 2,417.56 mi (3,890.69 km) |
| Middlesex to Dranesville (Virginia) | 187.31 mi (301.45 km) |
| Middlesex to Draper (Utah) | 1,946.79 mi (3,133.06 km) |
| Middlesex to Drexel Heights (Arizona) | 2,098.66 mi (3,377.47 km) |
| Middlesex to Drexel Hill (Pennsylvania) | 60.46 mi (97.30 km) |
| Middlesex to Duarte (California) | 2,401.88 mi (3,865.45 km) |
| Middlesex to Dublin (California) | 2,516.67 mi (4,050.19 km) |
| Middlesex to Dublin (Georgia) | 725.35 mi (1,167.33 km) |
| Middlesex to Dublin (Ohio) | 456.16 mi (734.13 km) |
| Middlesex to Dubuque (Iowa) | 847.28 mi (1,363.57 km) |
| Middlesex to Duluth (Georgia) | 697.27 mi (1,122.15 km) |
