| Rio Grande City to Myrtle Grove (Florida) | 753.07 mi (1,211.94 km) |
| Rio Grande City to Myrtle Grove (North Carolina) | 1,355.94 mi (2,182.17 km) |
| Rio Grande City to Nacogdoches (Texas) | 440.55 mi (708.99 km) |
| Rio Grande City to Nampa (Idaho) | 1,549.26 mi (2,493.29 km) |
| Rio Grande City to Nanakuli (Hawaii) | 3,731.77 mi (6,005.71 km) |
| Rio Grande City to Nanticoke (Pennsylvania) | 1,654.10 mi (2,662.01 km) |
| Rio Grande City to Nanuet (New York) | 1,740.38 mi (2,800.88 km) |
| Rio Grande City to Napa (California) | 1,591.87 mi (2,561.86 km) |
| Rio Grande City to Naperville (Illinois) | 1,222.16 mi (1,966.88 km) |
| Rio Grande City to Naples (Florida) | 1,054.39 mi (1,696.88 km) |
| Rio Grande City to Naranja (Florida) | 1,143.70 mi (1,840.61 km) |
| Rio Grande City to Nashua (New Hampshire) | 1,908.41 mi (3,071.30 km) |
| Rio Grande City to Nashville (Tennessee) | 979.69 mi (1,576.66 km) |
| Rio Grande City to Natchez (Mississippi) | 573.52 mi (923.00 km) |
| Rio Grande City to Natchitoches (Louisiana) | 505.97 mi (814.28 km) |
