| San Marino to Cibolo (Texas) | 1,207.61 mi (1,943.47 km) |
| San Marino to Cicero (Illinois) | 1,726.53 mi (2,778.58 km) |
| San Marino to Cimarron Hills (Colorado) | 812.76 mi (1,308.00 km) |
| San Marino to Cincinnati (Ohio) | 1,884.28 mi (3,032.45 km) |
| San Marino to Cinco Ranch (Texas) | 1,342.28 mi (2,160.19 km) |
| San Marino to Circleville (Ohio) | 1,968.25 mi (3,167.59 km) |
| San Marino to Citrus (California) | 12.83 mi (20.64 km) |
| San Marino to Citrus Heights (California) | 361.84 mi (582.32 km) |
| San Marino to Citrus Park (Florida) | 2,133.33 mi (3,433.26 km) |
| San Marino to Claiborne (Louisiana) | 1,496.04 mi (2,407.65 km) |
| San Marino to Claremont (California) | 22.76 mi (36.63 km) |
| San Marino to Claremont (New Hampshire) | 2,514.68 mi (4,046.99 km) |
| San Marino to Claremore (Oklahoma) | 1,276.34 mi (2,054.06 km) |
| San Marino to Clarksburg (Maryland) | 2,271.48 mi (3,655.60 km) |
| San Marino to Clarksburg (West Virginia) | 2,107.94 mi (3,392.40 km) |
