| Rancho Santa Margarita to Cibolo (Texas) | 1,173.10 mi (1,887.93 km) |
| Rancho Santa Margarita to Cicero (Illinois) | 1,716.02 mi (2,761.67 km) |
| Rancho Santa Margarita to Cimarron Hills (Colorado) | 803.38 mi (1,292.92 km) |
| Rancho Santa Margarita to Cincinnati (Ohio) | 1,868.81 mi (3,007.56 km) |
| Rancho Santa Margarita to Cinco Ranch (Texas) | 1,309.18 mi (2,106.92 km) |
| Rancho Santa Margarita to Circleville (Ohio) | 1,953.50 mi (3,143.86 km) |
| Rancho Santa Margarita to Citrus (California) | 37.37 mi (60.14 km) |
| Rancho Santa Margarita to Citrus Heights (California) | 405.77 mi (653.02 km) |
| Rancho Santa Margarita to Citrus Park (Florida) | 2,103.11 mi (3,384.63 km) |
| Rancho Santa Margarita to Claiborne (Louisiana) | 1,468.72 mi (2,363.68 km) |
| Rancho Santa Margarita to Claremont (California) | 34.79 mi (55.98 km) |
| Rancho Santa Margarita to Claremont (New Hampshire) | 2,505.24 mi (4,031.79 km) |
| Rancho Santa Margarita to Claremore (Oklahoma) | 1,255.90 mi (2,021.17 km) |
| Rancho Santa Margarita to Clarksburg (Maryland) | 2,256.35 mi (3,631.24 km) |
| Rancho Santa Margarita to Clarksburg (West Virginia) | 2,092.74 mi (3,367.94 km) |
