| Rio Grande City to Camarillo (California) | 1,318.59 mi (2,122.06 km) |
| Rio Grande City to Camas (Washington) | 1,858.58 mi (2,991.10 km) |
| Rio Grande City to Cambridge (Maryland) | 1,563.14 mi (2,515.64 km) |
| Rio Grande City to Cambridge (Massachusetts) | 1,913.64 mi (3,079.71 km) |
| Rio Grande City to Camden (Arkansas) | 611.61 mi (984.28 km) |
| Rio Grande City to Camden (New Jersey) | 1,652.41 mi (2,659.30 km) |
| Rio Grande City to Cameron Park (California) | 1,538.98 mi (2,476.74 km) |
| Rio Grande City to Camp Pendleton South (California) | 1,207.55 mi (1,943.37 km) |
| Rio Grande City to Camp Springs (Maryland) | 1,530.48 mi (2,463.07 km) |
| Rio Grande City to Camp Verde (Arizona) | 959.04 mi (1,543.43 km) |
| Rio Grande City to Campbell (California) | 1,546.61 mi (2,489.04 km) |
| Rio Grande City to Campbellsville (Kentucky) | 1,092.59 mi (1,758.35 km) |
| Rio Grande City to Campton Hills (Illinois) | 1,226.98 mi (1,974.63 km) |
| Rio Grande City to Canby (Oregon) | 1,854.53 mi (2,984.58 km) |
| Rio Grande City to Candelaria (Puerto Rico) | 2,148.00 mi (3,456.88 km) |
