| Portage to Cibolo (Texas) | 1,120.53 mi (1,803.32 km) |
| Portage to Cicero (Illinois) | 113.99 mi (183.45 km) |
| Portage to Cimarron Hills (Colorado) | 1,027.34 mi (1,653.35 km) |
| Portage to Cincinnati (Ohio) | 218.84 mi (352.19 km) |
| Portage to Cinco Ranch (Texas) | 1,030.07 mi (1,657.74 km) |
| Portage to Circleville (Ohio) | 226.62 mi (364.72 km) |
| Portage to Citrus (California) | 1,828.90 mi (2,943.32 km) |
| Portage to Citrus Heights (California) | 1,878.67 mi (3,023.43 km) |
| Portage to Citrus Park (Florida) | 990.77 mi (1,594.49 km) |
| Portage to Claiborne (Louisiana) | 759.21 mi (1,221.83 km) |
| Portage to Claremont (California) | 1,819.75 mi (2,928.61 km) |
| Portage to Claremont (New Hampshire) | 676.22 mi (1,088.26 km) |
| Portage to Claremore (Oklahoma) | 672.02 mi (1,081.51 km) |
| Portage to Clarksburg (Maryland) | 481.73 mi (775.27 km) |
| Portage to Clarksburg (West Virginia) | 341.30 mi (549.27 km) |
