| Middlesex to Mendota (California) | 2,461.06 mi (3,960.69 km) |
| Middlesex to Mendota Heights (Minnesota) | 989.12 mi (1,591.83 km) |
| Middlesex to Menifee (California) | 2,374.93 mi (3,822.07 km) |
| Middlesex to Menlo Park (California) | 2,536.44 mi (4,082.00 km) |
| Middlesex to Menomonee Falls (Wisconsin) | 722.24 mi (1,162.34 km) |
| Middlesex to Menomonie (Wisconsin) | 930.20 mi (1,497.02 km) |
| Middlesex to Mentor (Ohio) | 363.84 mi (585.55 km) |
| Middlesex to Mequon (Wisconsin) | 716.39 mi (1,152.92 km) |
| Middlesex to Merced (California) | 2,453.11 mi (3,947.90 km) |
| Middlesex to Mercedes (Texas) | 1,669.72 mi (2,687.16 km) |
| Middlesex to Mercer Island (Washington) | 2,379.17 mi (3,828.91 km) |
| Middlesex to Mercerville (New Jersey) | 25.44 mi (40.94 km) |
| Middlesex to Meriden (Connecticut) | 111.03 mi (178.68 km) |
| Middlesex to Meridian (Idaho) | 2,135.47 mi (3,436.70 km) |
| Middlesex to Meridian (Mississippi) | 968.31 mi (1,558.34 km) |
