| Rio Grande City to Norton (Ohio) | 1,408.65 mi (2,267.00 km) |
| Rio Grande City to Norton Shores (Michigan) | 1,357.83 mi (2,185.22 km) |
| Rio Grande City to Norwalk (California) | 1,260.11 mi (2,027.95 km) |
| Rio Grande City to Norwalk (Connecticut) | 1,768.39 mi (2,845.95 km) |
| Rio Grande City to Norwalk (Iowa) | 1,083.99 mi (1,744.51 km) |
| Rio Grande City to Norwalk (Ohio) | 1,381.18 mi (2,222.80 km) |
| Rio Grande City to Norwich (Connecticut) | 1,843.70 mi (2,967.14 km) |
| Rio Grande City to Norwood (Ohio) | 1,211.97 mi (1,950.48 km) |
| Rio Grande City to Novato (California) | 1,598.87 mi (2,573.14 km) |
| Rio Grande City to Novi (Michigan) | 1,409.59 mi (2,268.52 km) |
| Rio Grande City to O'Fallon (Illinois) | 989.70 mi (1,592.76 km) |
| Rio Grande City to O'Fallon (Missouri) | 977.28 mi (1,572.79 km) |
| Rio Grande City to Oak Creek (Wisconsin) | 1,295.45 mi (2,084.83 km) |
| Rio Grande City to Oak Forest (Illinois) | 1,225.80 mi (1,972.73 km) |
| Rio Grande City to Oak Grove (Oregon) | 1,858.74 mi (2,991.35 km) |
