| Rio Grande City to Fort Madison (Iowa) | 1,072.84 mi (1,726.57 km) |
| Rio Grande City to Fort Meade (Maryland) | 1,548.55 mi (2,492.14 km) |
| Rio Grande City to Fort Mill (South Carolina) | 1,215.41 mi (1,956.01 km) |
| Rio Grande City to Fort Mohave (Arizona) | 1,107.21 mi (1,781.89 km) |
| Rio Grande City to Fort Morgan (Colorado) | 1,000.07 mi (1,609.45 km) |
| Rio Grande City to Fort Myers (Florida) | 1,049.99 mi (1,689.80 km) |
| Rio Grande City to Fort Oglethorpe (Georgia) | 998.42 mi (1,606.81 km) |
| Rio Grande City to Fort Payne (Alabama) | 959.22 mi (1,543.71 km) |
| Rio Grande City to Fort Pierce (Florida) | 1,139.80 mi (1,834.33 km) |
| Rio Grande City to Fort Smith (Arkansas) | 673.36 mi (1,083.67 km) |
| Rio Grande City to Fort Thomas (Kentucky) | 1,208.30 mi (1,944.56 km) |
| Rio Grande City to Fort Walton Beach (Florida) | 791.78 mi (1,274.24 km) |
| Rio Grande City to Fort Washington (Maryland) | 1,524.04 mi (2,452.71 km) |
| Rio Grande City to Fort Wayne (Indiana) | 1,281.21 mi (2,061.92 km) |
| Rio Grande City to Fort Worth (Texas) | 451.02 mi (725.85 km) |
