| Rio Grande City to Clemson (South Carolina) | 1,109.98 mi (1,786.34 km) |
| Rio Grande City to Clermont (Florida) | 1,058.01 mi (1,702.70 km) |
| Rio Grande City to Cleveland (Mississippi) | 701.63 mi (1,129.17 km) |
| Rio Grande City to Cleveland (Ohio) | 1,427.59 mi (2,297.49 km) |
| Rio Grande City to Cleveland (Tennessee) | 1,025.60 mi (1,650.55 km) |
| Rio Grande City to Cleveland Heights (Ohio) | 1,433.72 mi (2,307.36 km) |
| Rio Grande City to Cliffside Park (New Jersey) | 1,732.87 mi (2,788.79 km) |
| Rio Grande City to Clifton (Colorado) | 1,039.34 mi (1,672.66 km) |
| Rio Grande City to Clifton (New Jersey) | 1,726.32 mi (2,778.24 km) |
| Rio Grande City to Clinton (Iowa) | 1,174.18 mi (1,889.66 km) |
| Rio Grande City to Clinton (Maryland) | 1,529.36 mi (2,461.27 km) |
| Rio Grande City to Clinton (Mississippi) | 656.17 mi (1,056.00 km) |
| Rio Grande City to Clinton (Utah) | 1,268.97 mi (2,042.22 km) |
| Rio Grande City to Clive (Iowa) | 1,090.65 mi (1,755.23 km) |
| Rio Grande City to Cloquet (Minnesota) | 1,447.48 mi (2,329.49 km) |
