| Clay to Cortona | 5,054.66 mi (8,134.68 km) |
| Clay to Cosenza | 5,388.53 mi (8,672.01 km) |
| Clay to Cossato | 4,812.78 mi (7,745.42 km) |
| Clay to Costa Volpino | 4,886.17 mi (7,863.53 km) |
| Clay to Creazzo | 4,954.47 mi (7,973.45 km) |
| Clay to Crema | 4,884.03 mi (7,860.09 km) |
| Clay to Cremona | 4,906.73 mi (7,896.62 km) |
| Clay to Crevalcore | 4,968.45 mi (7,995.95 km) |
| Clay to Crispiano | 5,381.25 mi (8,660.29 km) |
| Clay to Crosia | 5,401.04 mi (8,692.14 km) |
| Clay to Crotone | 5,435.33 mi (8,747.32 km) |
| Clay to Cuneo | 4,824.33 mi (7,764.01 km) |
| Clay to Cuorgne | 4,796.30 mi (7,718.90 km) |
| Clay to Cusano Milanino | 4,856.69 mi (7,816.09 km) |
| Clay to Cutro | 5,431.37 mi (8,740.94 km) |
