| Clay to Cividale del Friuli | 5,015.75 mi (8,072.07 km) |
| Clay to Civita Castellana | 5,107.83 mi (8,220.27 km) |
| Clay to Civitanova Marche | 5,128.83 mi (8,254.06 km) |
| Clay to Civitavecchia | 5,088.09 mi (8,188.48 km) |
| Clay to Civitella in Val di Chiana | 5,037.95 mi (8,107.80 km) |
| Clay to Clusone | 4,878.13 mi (7,850.59 km) |
| Clay to Coccaglio | 4,889.99 mi (7,869.69 km) |
| Clay to Codigoro | 5,005.42 mi (8,055.44 km) |
| Clay to Codogno | 4,891.84 mi (7,872.66 km) |
| Clay to Codroipo | 5,001.88 mi (8,049.74 km) |
| Clay to Cogoleto | 4,871.84 mi (7,840.46 km) |
| Clay to Colle di Val d'Elsa | 5,013.28 mi (8,068.09 km) |
| Clay to Colle Salvetti | 4,978.15 mi (8,011.56 km) |
| Clay to Collecchio | 4,927.48 mi (7,930.01 km) |
| Clay to Colleferro | 5,154.70 mi (8,295.68 km) |
