| Sierpc to Cividale del Friuli | 545.36 mi (877.67 km) |
| Sierpc to Civita Castellana | 804.90 mi (1,295.36 km) |
| Sierpc to Civitanova Marche | 715.93 mi (1,152.17 km) |
| Sierpc to Civitavecchia | 829.49 mi (1,334.93 km) |
| Sierpc to Civitella in Val di Chiana | 748.70 mi (1,204.92 km) |
| Sierpc to Clusone | 650.74 mi (1,047.27 km) |
| Sierpc to Coccaglio | 667.36 mi (1,074.01 km) |
| Sierpc to Codigoro | 652.76 mi (1,050.52 km) |
| Sierpc to Codogno | 697.61 mi (1,122.69 km) |
| Sierpc to Codroipo | 564.25 mi (908.07 km) |
| Sierpc to Cogoleto | 771.31 mi (1,241.31 km) |
| Sierpc to Colle di Val d'Elsa | 763.08 mi (1,228.05 km) |
| Sierpc to Colle Salvetti | 766.75 mi (1,233.97 km) |
| Sierpc to Collecchio | 706.31 mi (1,136.70 km) |
| Sierpc to Colleferro | 830.13 mi (1,335.96 km) |
