| Frederick to Castle Pines (Colorado) | 1,459.18 mi (2,348.33 km) |
| Frederick to Castle Rock (Colorado) | 1,459.20 mi (2,348.35 km) |
| Frederick to Castro Valley (California) | 2,390.04 mi (3,846.40 km) |
| Frederick to Catalina Foothills (Arizona) | 1,925.57 mi (3,098.90 km) |
| Frederick to Cataño (Puerto Rico) | 1,599.55 mi (2,574.22 km) |
| Frederick to Cathedral City (California) | 2,181.99 mi (3,511.57 km) |
| Frederick to Catonsville (Maryland) | 37.74 mi (60.74 km) |
| Frederick to Cave Spring (Virginia) | 207.43 mi (333.82 km) |
| Frederick to Cayce (South Carolina) | 429.07 mi (690.53 km) |
| Frederick to Cayey (Puerto Rico) | 1,619.67 mi (2,606.61 km) |
| Frederick to Cedar City (Utah) | 1,919.06 mi (3,088.43 km) |
| Frederick to Cedar Falls (Iowa) | 811.74 mi (1,306.37 km) |
| Frederick to Cedar Hill (Texas) | 1,187.37 mi (1,910.89 km) |
| Frederick to Cedar Lake (Indiana) | 543.81 mi (875.17 km) |
| Frederick to Cedar Mill (Oregon) | 2,318.92 mi (3,731.94 km) |
