| San Marino to Cullman (Alabama) | 1,781.02 mi (2,866.28 km) |
| San Marino to Culpeper (Virginia) | 2,236.15 mi (3,598.74 km) |
| San Marino to Culver City (California) | 18.12 mi (29.16 km) |
| San Marino to Cumberland (Maryland) | 2,190.27 mi (3,524.90 km) |
| San Marino to Cupertino (California) | 312.03 mi (502.16 km) |
| San Marino to Cutler Bay (Florida) | 2,325.40 mi (3,742.37 km) |
| San Marino to Cutlerville (Michigan) | 1,841.67 mi (2,963.89 km) |
| San Marino to Cuyahoga Falls (Ohio) | 2,044.18 mi (3,289.79 km) |
| San Marino to Cypress (California) | 21.52 mi (34.64 km) |
| San Marino to Cypress Gardens (Florida) | 2,185.15 mi (3,516.66 km) |
| San Marino to Cypress Lake (Florida) | 2,209.96 mi (3,556.59 km) |
| San Marino to D'Iberville (Mississippi) | 1,718.72 mi (2,766.00 km) |
| San Marino to Dakota Ridge (Colorado) | 810.58 mi (1,304.50 km) |
| San Marino to Dale City (Virginia) | 2,270.33 mi (3,653.74 km) |
| San Marino to Dallas (Georgia) | 1,896.89 mi (3,052.75 km) |
