Compared to the other cities in Illinois and cities in all other U.S. states, how safe is Forest Park, IL? From the gauges displayed above, you will notice that Forest Park, IL has been ranked safer than 15% of other cities in the state of Illinois. In addition, Forest Park, IL is safer than 30% of cities in the entire United States. To achieve these results, all Illinois and United States cities were analyzed to determine how many locations had a lower crime rate than Forest Park, IL. By studying this data, it was possible to determine that Forest Park, IL is below average in safety when compared with other United States cities.