| Middlesex to Marrero (Louisiana) | 1,146.44 mi (1,845.02 km) |
| Middlesex to Marshall (Minnesota) | 1,113.33 mi (1,791.72 km) |
| Middlesex to Marshall (Missouri) | 995.23 mi (1,601.67 km) |
| Middlesex to Marshall (Texas) | 1,229.86 mi (1,979.27 km) |
| Middlesex to Marshalltown (Iowa) | 958.76 mi (1,542.98 km) |
| Middlesex to Marshfield (Wisconsin) | 843.76 mi (1,357.90 km) |
| Middlesex to Martha Lake (Washington) | 2,377.15 mi (3,825.65 km) |
| Middlesex to Martin (Tennessee) | 828.54 mi (1,333.41 km) |
| Middlesex to Martinez (California) | 2,521.45 mi (4,057.88 km) |
| Middlesex to Martinez (Georgia) | 642.14 mi (1,033.43 km) |
| Middlesex to Martinsburg (West Virginia) | 199.45 mi (320.99 km) |
| Middlesex to Martinsville (Indiana) | 636.07 mi (1,023.66 km) |
| Middlesex to Martinsville (New Jersey) | 4.36 mi (7.01 km) |
| Middlesex to Martinsville (Virginia) | 394.93 mi (635.58 km) |
| Middlesex to Maryland City (Maryland) | 159.04 mi (255.95 km) |
