| San Marino to Cividale del Friuli | 6,125.39 mi (9,857.86 km) |
| San Marino to Civita Castellana | 6,299.01 mi (10,137.28 km) |
| San Marino to Civitanova Marche | 6,286.56 mi (10,117.25 km) |
| San Marino to Civitavecchia | 6,289.77 mi (10,122.40 km) |
| San Marino to Civitella in Val di Chiana | 6,216.83 mi (10,005.02 km) |
| San Marino to Clusone | 6,030.54 mi (9,705.22 km) |
| San Marino to Coccaglio | 6,048.19 mi (9,733.62 km) |
| San Marino to Codigoro | 6,153.71 mi (9,903.44 km) |
| San Marino to Codogno | 6,060.62 mi (9,753.62 km) |
| San Marino to Codroipo | 6,119.28 mi (9,848.03 km) |
| San Marino to Cogoleto | 6,066.43 mi (9,762.97 km) |
| San Marino to Colle di Val d'Elsa | 6,199.02 mi (9,976.36 km) |
| San Marino to Colle Salvetti | 6,167.47 mi (9,925.58 km) |
| San Marino to Collecchio | 6,098.41 mi (9,814.44 km) |
| San Marino to Colleferro | 6,348.83 mi (10,217.45 km) |
