| San Marino to Carrollwood (Florida) | 2,136.44 mi (3,438.26 km) |
| San Marino to Carson (California) | 21.32 mi (34.31 km) |
| San Marino to Carson City (Nevada) | 359.05 mi (577.84 km) |
| San Marino to Carteret (New Jersey) | 2,425.71 mi (3,903.80 km) |
| San Marino to Cartersville (Georgia) | 1,896.29 mi (3,051.79 km) |
| San Marino to Carthage (Missouri) | 1,348.59 mi (2,170.34 km) |
| San Marino to Cary (Illinois) | 1,705.46 mi (2,744.68 km) |
| San Marino to Cary (North Carolina) | 2,213.27 mi (3,561.92 km) |
| San Marino to Casa de Oro-Mount Helix (California) | 114.72 mi (184.63 km) |
| San Marino to Casa Grande (Arizona) | 375.29 mi (603.97 km) |
| San Marino to Casas Adobes (Arizona) | 428.36 mi (689.38 km) |
| San Marino to Cascades (Virginia) | 2,265.89 mi (3,646.59 km) |
| San Marino to Casper (Wyoming) | 875.75 mi (1,409.38 km) |
| San Marino to Casselberry (Florida) | 2,190.50 mi (3,525.27 km) |
| San Marino to Castaic (California) | 38.63 mi (62.17 km) |
