County Crime Rates
The overall crime rate of a county is calculated by dividing the total number of Index crimes submitted by police agencies in each county by the county’s population and multiplying the result by 100,000. The U.S. Census Bureau is the source of county population data.
The same formula is used to calculate the violent crime rate, violent crime with a firearm, and property crime rate for each county. Crime rates for the most recent five years (data posted 6/2021):
Index crime by police agency and crime rate data for each county back to 1990 are available through the Open Data Portal.