Compared to the other cities in New Jersey and cities in all other U.S. states, how safe is Hackettstown, NJ? From the gauges displayed above, you will notice that Hackettstown, NJ has been ranked safer than 81% of other cities in the state of New Jersey. In addition, Hackettstown, NJ is safer than 92% of cities in the entire United States. To achieve these results, all New Jersey and United States cities were analyzed to determine how many locations had a lower crime rate than Hackettstown, NJ. By studying this data, it was possible to determine that Hackettstown, NJ is above average in safety when compared with other United States cities.