| Hackettstown to Castle Pines (Colorado) | 1,581.67 mi (2,545.45 km) |
| Hackettstown to Castle Rock (Colorado) | 1,582.15 mi (2,546.23 km) |
| Hackettstown to Castro Valley (California) | 2,504.99 mi (4,031.40 km) |
| Hackettstown to Catalina Foothills (Arizona) | 2,069.75 mi (3,330.94 km) |
| Hackettstown to Cataño (Puerto Rico) | 1,632.07 mi (2,626.56 km) |
| Hackettstown to Cathedral City (California) | 2,315.41 mi (3,726.30 km) |
| Hackettstown to Catonsville (Maryland) | 149.44 mi (240.49 km) |
| Hackettstown to Cave Spring (Virginia) | 374.27 mi (602.33 km) |
| Hackettstown to Cayce (South Carolina) | 586.38 mi (943.69 km) |
| Hackettstown to Cayey (Puerto Rico) | 1,653.09 mi (2,660.38 km) |
| Hackettstown to Cedar City (Utah) | 2,042.46 mi (3,287.03 km) |
| Hackettstown to Cedar Falls (Iowa) | 915.13 mi (1,472.76 km) |
| Hackettstown to Cedar Hill (Texas) | 1,347.49 mi (2,168.58 km) |
| Hackettstown to Cedar Lake (Indiana) | 656.99 mi (1,057.32 km) |
| Hackettstown to Cedar Mill (Oregon) | 2,401.77 mi (3,865.27 km) |
