Grundy County, IL Crime Statistics
Crime Overview
Grundy County in IL is served by 3 law enforcement agencies. Over the past five years (2019-2024), the county recorded 742 violent crimes and 1,684 property crimes. The average violent crime rate stands at 37.7 per 100k residents, which is 64.5% below the national average. Property crime averages 74.5 per 100k, 54.5% below the national average. The most common offense was Property Crime, while Motor Vehicle Theft had the lowest rate. Data is sourced from the FBI Crime Data Explorer and reflects totals from the most recent five-year period.
Violent Crimes
Violent Crime
Grade AAnnual Rate37.7 per 100k residents
National Avg: 106.2 per 100k
Total Incidents742 (2019-2023)
Homicide
Grade N/ANot enough data to calculate a meaningful rate.
Rape
Grade N/AInsufficient data to calculate annual rate.
Robbery
Grade N/AInsufficient data to calculate annual rate.
Aggravated Assault
Grade AAnnual Rate6.4 per 100k residents
National Avg: 22.3 per 100k
Total Incidents105 (2019-2023)
Property Crimes
Property Crime
Grade AAnnual Rate74.5 per 100k residents
National Avg: 163.6 per 100k
Total Incidents1,684 (2019-2023)
Burglary
Grade AAnnual Rate2.3 per 100k residents
National Avg: 24.0 per 100k
Total Incidents202 (2019-2023)
Larceny
Grade AAnnual Rate70.1 per 100k residents
National Avg: 116.4 per 100k
Total Incidents1,397 (2019-2023)
Motor Vehicle Theft
Grade AAnnual Rate2.1 per 100k residents
National Avg: 22.2 per 100k
Total Incidents74 (2019-2023)
Summary Table
| Crime Type | Annual Rate (per 100k residents) | Grade | Total Incidents (2019-2023) | National Avg | % Difference |
|---|---|---|---|---|---|
| Violent Crime | 37.7 | A | 742 | 106.2 | -64.5% |
| Property Crime | 74.5 | A | 1684 | 163.6 | -54.5% |
| Homicide | 0.0 | A | 6 | 0.5 | -100.0% |
| Rape | 0.0 | A | 87 | 3.5 | -100.0% |
| Robbery | 0.0 | A | 18 | 5.8 | -100.0% |
| Aggravated Assault | 6.4 | A | 105 | 22.3 | -71.1% |
| Burglary | 2.3 | A | 202 | 24.0 | -90.4% |
| Larceny | 70.1 | A | 1397 | 116.4 | -39.8% |
| Motor Vehicle Theft | 2.1 | A | 74 | 22.2 | -90.3% |
Crime Trends
Agencies
Grundy County Sheriff's Office
Mazon Police Department
Mazon, IL
Morris Police Department
Morris, IL