07840 is zip code located in Hackettstown, New Jersey. The population is 29,658, making 07840 the largest zipcode in Hackettstown and the 2nd largest in Warren County.
There are 4 public schools in 07840 with an average Homefacts rating of B. The total crime rate for Hackettstown is very low , and there are 6 registered sex offenders residing in the zip code 07840. Unemployment in 07840 is moderate.