Illinois • Police Codes Reference
Illinois Police Codes & 10-Codes
This page is your organized reference for Illinois police codes, including common 10-codes, radio signals, and key statute references used by law enforcement in Illinois.
How Illinois Police Codes Work
Illinois law enforcement agencies typically use a mix of 10-codes, plain language, and statute shorthand. Exact usage can vary by agency, county, and region.
This guide focuses on the codes and shorthand you're most likely to see in field reports, radio traffic, and training materials. Always confirm the exact code list your academy or department uses.
- Common 10-codes with typical meanings
- High-frequency statute or penal references (where available)
- Plain-language explanations for quick study and reference