| Rio Grande City to Robertsville (New Jersey) | 1,703.35 mi (2,741.28 km) |
| Rio Grande City to Robinson (Texas) | 365.04 mi (587.47 km) |
| Rio Grande City to Robstown (Texas) | 120.66 mi (194.18 km) |
| Rio Grande City to Rochester (Michigan) | 1,432.93 mi (2,306.07 km) |
| Rio Grande City to Rochester (Minnesota) | 1,268.97 mi (2,042.20 km) |
| Rio Grande City to Rochester (New Hampshire) | 1,948.95 mi (3,136.53 km) |
| Rio Grande City to Rochester (New York) | 1,662.15 mi (2,674.98 km) |
| Rio Grande City to Rochester Hills (Michigan) | 1,430.54 mi (2,302.24 km) |
| Rio Grande City to Rock Hill (South Carolina) | 1,209.17 mi (1,945.97 km) |
| Rio Grande City to Rock Island (Illinois) | 1,143.18 mi (1,839.77 km) |
| Rio Grande City to Rock Springs (Wyoming) | 1,206.10 mi (1,941.02 km) |
| Rio Grande City to Rockford (Illinois) | 1,228.28 mi (1,976.73 km) |
| Rio Grande City to Rockledge (Florida) | 1,116.89 mi (1,797.46 km) |
| Rio Grande City to Rocklin (California) | 1,555.73 mi (2,503.71 km) |
| Rio Grande City to Rockport (Texas) | 156.60 mi (252.02 km) |
