The table above illustrates an overview of the annual crime reported in Marengo, IL. These figures on reported criminal activity in Marengo, IL, based on a reported crime per 100,000 citizens, is shown in order to compare these rates across disparate categories. You will notice that the crimes collected here, for comparison purposes, have been separated between violent crimes and those involving or threatening property. According to the annual crime data, the crime rate in Marengo, IL is 55% lower than the average of the whole of the state of Illinois, and when compared with the national average, is 63% lower than. When looking at violent crimes, Marengo, IL has 90% lower than violent crime rate than Illinois average, while remaining 89% lower than the national average. In property crime, Marengo, IL is 48% lower than the average of Illinois and is 59% lower than the national average.