| Rio Grande City to Johnstown (Pennsylvania) | 1,492.85 mi (2,402.51 km) |
| Rio Grande City to Joliet (Illinois) | 1,209.37 mi (1,946.30 km) |
| Rio Grande City to Jonesboro (Arkansas) | 810.12 mi (1,303.77 km) |
| Rio Grande City to Joplin (Missouri) | 781.07 mi (1,257.01 km) |
| Rio Grande City to Joppatowne (Maryland) | 1,577.19 mi (2,538.24 km) |
| Rio Grande City to Juana Díaz (Puerto Rico) | 2,139.17 mi (3,442.67 km) |
| Rio Grande City to Junction City (Kansas) | 881.23 mi (1,418.20 km) |
| Rio Grande City to Juneau (Alaska) | 2,795.01 mi (4,498.13 km) |
| Rio Grande City to Jupiter (Florida) | 1,154.87 mi (1,858.58 km) |
| Rio Grande City to Jupiter Farms (Florida) | 1,148.33 mi (1,848.06 km) |
| Rio Grande City to Jurupa Valley (California) | 1,229.29 mi (1,978.35 km) |
| Rio Grande City to Justice (Illinois) | 1,231.67 mi (1,982.18 km) |
| Rio Grande City to Kahului (Hawaii) | 3,639.40 mi (5,857.05 km) |
| Rio Grande City to Kailua (Hawaii) | 3,706.91 mi (5,965.69 km) |
| Rio Grande City to Kalamazoo (Michigan) | 1,329.10 mi (2,138.98 km) |
