| Portage to Crawfordsville (Indiana) | 163.83 mi (263.66 km) |
| Portage to Crest Hill (Illinois) | 136.77 mi (220.11 km) |
| Portage to Crestview (Florida) | 793.16 mi (1,276.47 km) |
| Portage to Crestwood (Illinois) | 116.93 mi (188.19 km) |
| Portage to Crestwood (Missouri) | 356.06 mi (573.02 km) |
| Portage to Creve Coeur (Missouri) | 353.27 mi (568.54 km) |
| Portage to Crofton (Maryland) | 516.28 mi (830.87 km) |
| Portage to Crossville (Tennessee) | 432.70 mi (696.36 km) |
| Portage to Crowley (Louisiana) | 909.44 mi (1,463.60 km) |
| Portage to Crowley (Texas) | 925.24 mi (1,489.03 km) |
| Portage to Crown Point (Indiana) | 105.44 mi (169.68 km) |
| Portage to Crystal (Minnesota) | 435.02 mi (700.09 km) |
| Portage to Crystal Lake (Illinois) | 140.45 mi (226.04 km) |
| Portage to Cudahy (California) | 1,848.70 mi (2,975.19 km) |
| Portage to Cudahy (Wisconsin) | 126.66 mi (203.83 km) |
