| Hard to Cookeville (Tennessee) | 4,652.30 mi (7,487.15 km) |
| Hard to Coolidge (Arizona) | 5,794.49 mi (9,325.32 km) |
| Hard to Coon Rapids (Minnesota) | 4,521.28 mi (7,276.30 km) |
| Hard to Cooper City (Florida) | 4,912.47 mi (7,905.86 km) |
| Hard to Coos Bay (Oregon) | 5,559.83 mi (8,947.68 km) |
| Hard to Copiague (New York) | 3,950.11 mi (6,357.08 km) |
| Hard to Coppell (Texas) | 5,265.62 mi (8,474.19 km) |
| Hard to Copperas Cove (Texas) | 5,396.94 mi (8,685.53 km) |
| Hard to Coral Gables (Florida) | 4,928.40 mi (7,931.49 km) |
| Hard to Coral Springs (Florida) | 4,900.45 mi (7,886.51 km) |
| Hard to Coral Terrace (Florida) | 4,927.81 mi (7,930.55 km) |
| Hard to Coralville (Iowa) | 4,625.43 mi (7,443.92 km) |
| Hard to Coram (New York) | 3,925.21 mi (6,317.02 km) |
| Hard to Corcoran (California) | 5,867.05 mi (9,442.11 km) |
| Hard to Cordele (Georgia) | 4,779.35 mi (7,691.61 km) |
