Compared to the other cities in New Jersey and cities in all other U.S. states, how safe is Sayreville, NJ? From the gauges displayed above, you will notice that Sayreville, NJ has been ranked safer than 57% of other cities in the state of New Jersey. In addition, Sayreville, NJ is safer than 80% 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 Sayreville, NJ. By studying this data, it was possible to determine that Sayreville, NJ is above average in safety when compared with other United States cities.