Compared to the other cities in Indiana and cities in all other U.S. states, how safe is Plainfield, IN? From the gauges displayed above, you will notice that Plainfield, IN has been ranked safer than 43% of other cities in the state of Indiana. In addition, Plainfield, IN is safer than 34% of cities in the entire United States. To achieve these results, all Indiana and United States cities were analyzed to determine how many locations had a lower crime rate than Plainfield, IN. By studying this data, it was possible to determine that Plainfield, IN is below average in safety when compared with other United States cities.