Compared to the other cities in Illinois and cities in all other U.S. states, how safe is Buffalo Grove, IL? From the gauges displayed above, you will notice that Buffalo Grove, IL has been ranked safer than 88% of other cities in the state of Illinois. In addition, Buffalo Grove, IL is safer than 92% 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 Buffalo Grove, IL. By studying this data, it was possible to determine that Buffalo Grove, IL is above average in safety when compared with other United States cities.