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Most Dangerous Cities in Illinois (2025)

The FBI-reporting cities in Illinois with the lowest Crime Index scores for 2025. Scores run 0–100 (higher = safer) and are built from FBI Crime Data Explorer reports.

Showing the 14 most dangerous of 29 cities

Not the same cities shown on the safest cities in Illinois list. See the full ranked list →

No area has zero risk

A high Crime Index score means lower reported crime relative to other US cities — it is not a guarantee of safety. Reported crime is not the same as actual crime. Research on the gap between crime that occurs and crime that gets reported to police — often called the "dark figure" of crime — estimates that roughly 40% of violent crime and about a third of property crime go unreported each year. Every index built on official statistics, including this one, necessarily undercounts real crime. That gap is exactly why homicide — the offense with the smallest dark figure — anchors the calculation instead of a more commonly reported but less reliable category like theft.

Scores on this page reflect FBI-reported data for 2025. See the full methodology →

Back to Crime Rate in Illinois