| Monroe to McHenry (Illinois) | 709.36 mi (1,141.60 km) |
| Monroe to McKeesport (Pennsylvania) | 867.27 mi (1,395.74 km) |
| Monroe to McKinleyville (California) | 1,853.58 mi (2,983.06 km) |
| Monroe to McKinney (Texas) | 270.50 mi (435.32 km) |
| Monroe to McLean (Virginia) | 943.76 mi (1,518.84 km) |
| Monroe to McMinnville (Oregon) | 1,873.39 mi (3,014.93 km) |
| Monroe to McMinnville (Tennessee) | 421.36 mi (678.12 km) |
| Monroe to McNair (Virginia) | 933.29 mi (1,501.99 km) |
| Monroe to McPherson (Kansas) | 511.91 mi (823.84 km) |
| Monroe to Mead Valley (California) | 1,456.98 mi (2,344.78 km) |
| Monroe to Meadow Woods (Florida) | 700.05 mi (1,126.62 km) |
| Monroe to Meadowbrook (Virginia) | 892.46 mi (1,436.27 km) |
| Monroe to Meadville (Pennsylvania) | 909.54 mi (1,463.76 km) |
| Monroe to Mebane (North Carolina) | 770.50 mi (1,240.00 km) |
| Monroe to Mechanicsville (Virginia) | 902.85 mi (1,452.99 km) |
