| Rockwall to McHenry (Illinois) | 788.05 mi (1,268.24 km) |
| Rockwall to McKeesport (Pennsylvania) | 1,050.93 mi (1,691.30 km) |
| Rockwall to McKinleyville (California) | 1,616.42 mi (2,601.38 km) |
| Rockwall to McKinney (Texas) | 23.74 mi (38.21 km) |
| Rockwall to McLean (Virginia) | 1,151.49 mi (1,853.14 km) |
| Rockwall to McMinnville (Oregon) | 1,656.20 mi (2,665.39 km) |
| Rockwall to McMinnville (Tennessee) | 637.21 mi (1,025.49 km) |
| Rockwall to McNair (Virginia) | 1,140.38 mi (1,835.26 km) |
| Rockwall to McPherson (Kansas) | 383.06 mi (616.48 km) |
| Rockwall to Mead Valley (California) | 1,202.51 mi (1,935.25 km) |
| Rockwall to Meadow Woods (Florida) | 949.39 mi (1,527.90 km) |
| Rockwall to Meadowbrook (Virginia) | 1,113.25 mi (1,791.60 km) |
| Rockwall to Meadville (Pennsylvania) | 1,076.89 mi (1,733.09 km) |
| Rockwall to Mebane (North Carolina) | 1,000.09 mi (1,609.49 km) |
| Rockwall to Mechanicsville (Virginia) | 1,122.15 mi (1,805.92 km) |
