| Rio Grande City to National City (California) | 1,179.45 mi (1,898.15 km) |
| Rio Grande City to Naugatuck (Connecticut) | 1,797.31 mi (2,892.49 km) |
| Rio Grande City to Navarre (Florida) | 776.38 mi (1,249.46 km) |
| Rio Grande City to Nederland (Texas) | 384.24 mi (618.37 km) |
| Rio Grande City to Neenah (Wisconsin) | 1,357.76 mi (2,185.10 km) |
| Rio Grande City to Neosho (Missouri) | 768.52 mi (1,236.81 km) |
| Rio Grande City to Nesconset (New York) | 1,772.61 mi (2,852.74 km) |
| Rio Grande City to New Albany (Indiana) | 1,117.86 mi (1,799.03 km) |
| Rio Grande City to New Albany (Ohio) | 1,320.59 mi (2,125.28 km) |
| Rio Grande City to New Baltimore (Michigan) | 1,446.43 mi (2,327.80 km) |
| Rio Grande City to New Baltimore (Virginia) | 1,490.89 mi (2,399.36 km) |
| Rio Grande City to New Bedford (Massachusetts) | 1,900.66 mi (3,058.82 km) |
| Rio Grande City to New Berlin (Wisconsin) | 1,294.85 mi (2,083.87 km) |
| Rio Grande City to New Bern (North Carolina) | 1,420.87 mi (2,286.67 km) |
| Rio Grande City to New Braunfels (Texas) | 233.31 mi (375.47 km) |
