Compared to the other cities in Illinois and cities in all other U.S. states, how safe is Carbondale, IL? From the gauges displayed above, you will notice that Carbondale, IL has been ranked safer than 8% of other cities in the state of Illinois. In addition, Carbondale, IL is safer than 16% 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 Carbondale, IL. By studying this data, it was possible to determine that Carbondale, IL is below average in safety when compared with other United States cities.