| Viterbo to Cividale del Friuli | 262.71 mi (422.80 km) |
| Viterbo to Civita Castellana | 17.76 mi (28.58 km) |
| Viterbo to Civitanova Marche | 102.55 mi (165.03 km) |
| Viterbo to Civitavecchia | 26.95 mi (43.38 km) |
| Viterbo to Civitella in Val di Chiana | 71.69 mi (115.38 km) |
| Viterbo to Clusone | 262.10 mi (421.81 km) |
| Viterbo to Coccaglio | 241.59 mi (388.80 km) |
| Viterbo to Codigoro | 166.84 mi (268.50 km) |
| Viterbo to Codogno | 224.02 mi (360.53 km) |
| Viterbo to Codroipo | 248.66 mi (400.18 km) |
| Viterbo to Cogoleto | 220.59 mi (355.01 km) |
| Viterbo to Colle di Val d'Elsa | 83.74 mi (134.76 km) |
| Viterbo to Colle Salvetti | 115.62 mi (186.08 km) |
| Viterbo to Collecchio | 186.73 mi (300.51 km) |
| Viterbo to Colleferro | 66.57 mi (107.14 km) |
