| Hard to Camas (Washington) | 5,382.49 mi (8,662.27 km) |
| Hard to Cambridge (Maryland) | 4,152.93 mi (6,683.49 km) |
| Hard to Cambridge (Massachusetts) | 3,785.64 mi (6,092.40 km) |
| Hard to Camden (Arkansas) | 5,072.79 mi (8,163.86 km) |
| Hard to Camden (New Jersey) | 4,052.70 mi (6,522.18 km) |
| Hard to Cameron Park (California) | 5,755.05 mi (9,261.85 km) |
| Hard to Camp Pendleton South (California) | 5,968.11 mi (9,604.74 km) |
| Hard to Camp Springs (Maryland) | 4,177.10 mi (6,722.40 km) |
| Hard to Camp Verde (Arizona) | 5,713.69 mi (9,195.30 km) |
| Hard to Campbell (California) | 5,864.71 mi (9,438.35 km) |
| Hard to Campbellsville (Kentucky) | 4,589.50 mi (7,386.08 km) |
| Hard to Campton Hills (Illinois) | 4,494.20 mi (7,232.71 km) |
| Hard to Canby (Oregon) | 5,408.75 mi (8,704.54 km) |
| Hard to Candelaria (Puerto Rico) | 4,637.34 mi (7,463.08 km) |
| Hard to Candler-McAfee (Georgia) | 4,716.05 mi (7,589.76 km) |
