| Rio Grande City to Murphy (Texas) | 477.40 mi (768.30 km) |
| Rio Grande City to Murray (Kentucky) | 938.20 mi (1,509.89 km) |
| Rio Grande City to Murray (Utah) | 1,237.31 mi (1,991.26 km) |
| Rio Grande City to Murraysville (North Carolina) | 1,361.71 mi (2,191.46 km) |
| Rio Grande City to Murrieta (California) | 1,204.08 mi (1,937.79 km) |
| Rio Grande City to Murrysville (Pennsylvania) | 1,465.79 mi (2,358.96 km) |
| Rio Grande City to Muscatine (Iowa) | 1,128.99 mi (1,816.93 km) |
| Rio Grande City to Muscle Shoals (Alabama) | 880.26 mi (1,416.64 km) |
| Rio Grande City to Muscoy (California) | 1,226.47 mi (1,973.81 km) |
| Rio Grande City to Muskego (Wisconsin) | 1,289.74 mi (2,075.63 km) |
| Rio Grande City to Muskegon (Michigan) | 1,361.42 mi (2,191.00 km) |
| Rio Grande City to Muskogee (Oklahoma) | 678.46 mi (1,091.87 km) |
| Rio Grande City to Mustang (Oklahoma) | 625.97 mi (1,007.40 km) |
| Rio Grande City to Myers Corner (New York) | 1,762.70 mi (2,836.79 km) |
| Rio Grande City to Myrtle Beach (South Carolina) | 1,292.58 mi (2,080.20 km) |
