| Rio Grande City to Maricopa (Arizona) | 913.90 mi (1,470.78 km) |
| Rio Grande City to Marietta (Georgia) | 999.12 mi (1,607.92 km) |
| Rio Grande City to Marietta (Ohio) | 1,347.54 mi (2,168.65 km) |
| Rio Grande City to Marina (California) | 1,522.75 mi (2,450.62 km) |
| Rio Grande City to Marinette (Wisconsin) | 1,433.47 mi (2,306.94 km) |
| Rio Grande City to Marion (Arkansas) | 794.92 mi (1,279.30 km) |
| Rio Grande City to Marion (Illinois) | 973.37 mi (1,566.48 km) |
| Rio Grande City to Marion (Indiana) | 1,235.43 mi (1,988.23 km) |
| Rio Grande City to Marion (Iowa) | 1,157.46 mi (1,862.74 km) |
| Rio Grande City to Marion (Ohio) | 1,331.11 mi (2,142.21 km) |
| Rio Grande City to Marion Oaks (Florida) | 1,032.25 mi (1,661.25 km) |
| Rio Grande City to Markham (Illinois) | 1,227.31 mi (1,975.17 km) |
| Rio Grande City to Marlborough (Massachusetts) | 1,893.27 mi (3,046.93 km) |
| Rio Grande City to Marlton (New Jersey) | 1,659.71 mi (2,671.04 km) |
| Rio Grande City to Marquette (Michigan) | 1,526.95 mi (2,457.38 km) |
