| Hard to Commerce City (Colorado) | 5,188.92 mi (8,350.75 km) |
| Hard to Compton (California) | 5,955.44 mi (9,584.36 km) |
| Hard to Comstock Park (Michigan) | 4,339.72 mi (6,984.11 km) |
| Hard to Concord (California) | 5,824.83 mi (9,374.15 km) |
| Hard to Concord (Missouri) | 4,731.80 mi (7,615.09 km) |
| Hard to Concord (New Hampshire) | 3,769.97 mi (6,067.18 km) |
| Hard to Concord (North Carolina) | 4,485.88 mi (7,219.33 km) |
| Hard to Conneaut (Ohio) | 4,189.85 mi (6,742.92 km) |
| Hard to Connersville (Indiana) | 4,473.47 mi (7,199.35 km) |
| Hard to Conroe (Texas) | 5,342.24 mi (8,597.51 km) |
| Hard to Converse (Texas) | 5,496.35 mi (8,845.52 km) |
| Hard to Conway (Arkansas) | 4,982.59 mi (8,018.71 km) |
| Hard to Conway (Florida) | 4,840.35 mi (7,789.79 km) |
| Hard to Conway (South Carolina) | 4,489.79 mi (7,225.61 km) |
| Hard to Conyers (Georgia) | 4,707.50 mi (7,575.98 km) |
