| Portage to Castle Pines (Colorado) | 1,023.21 mi (1,646.70 km) |
| Portage to Castle Rock (Colorado) | 1,024.08 mi (1,648.10 km) |
| Portage to Castro Valley (California) | 1,941.36 mi (3,124.32 km) |
| Portage to Catalina Foothills (Arizona) | 1,541.96 mi (2,481.54 km) |
| Portage to Cataño (Puerto Rico) | 1,999.52 mi (3,217.92 km) |
| Portage to Cathedral City (California) | 1,765.67 mi (2,841.58 km) |
| Portage to Catonsville (Maryland) | 505.38 mi (813.34 km) |
| Portage to Cave Spring (Virginia) | 453.88 mi (730.45 km) |
| Portage to Cayce (South Carolina) | 621.38 mi (1,000.02 km) |
| Portage to Cayey (Puerto Rico) | 2,018.09 mi (3,247.80 km) |
| Portage to Cedar City (Utah) | 1,483.23 mi (2,387.02 km) |
| Portage to Cedar Falls (Iowa) | 350.99 mi (564.86 km) |
| Portage to Cedar Hill (Texas) | 910.05 mi (1,464.58 km) |
| Portage to Cedar Lake (Indiana) | 111.17 mi (178.91 km) |
| Portage to Cedar Mill (Oregon) | 1,850.97 mi (2,978.85 km) |
