| Monroe to Maryland Heights (Missouri) | 437.74 mi (704.47 km) |
| Monroe to Marysville (California) | 1,706.70 mi (2,746.67 km) |
| Monroe to Marysville (Ohio) | 719.63 mi (1,158.13 km) |
| Monroe to Marysville (Washington) | 1,896.05 mi (3,051.40 km) |
| Monroe to Maryville (Missouri) | 562.37 mi (905.05 km) |
| Monroe to Maryville (Tennessee) | 513.83 mi (826.94 km) |
| Monroe to Mason (Ohio) | 641.69 mi (1,032.70 km) |
| Monroe to Mason City (Iowa) | 737.00 mi (1,186.09 km) |
| Monroe to Massapequa (New York) | 1,172.32 mi (1,886.67 km) |
| Monroe to Massapequa Park (New York) | 1,173.71 mi (1,888.91 km) |
| Monroe to Massillon (Ohio) | 816.30 mi (1,313.70 km) |
| Monroe to Mastic (New York) | 1,206.19 mi (1,941.18 km) |
| Monroe to Mastic Beach (New York) | 1,205.60 mi (1,940.23 km) |
| Monroe to Matteson (Illinois) | 665.33 mi (1,070.75 km) |
| Monroe to Matthews (North Carolina) | 676.36 mi (1,088.50 km) |
