County Reports

1. Counties are included if at least two school districts participated at any grade level.
2. In most cases, the usage rates do not represent every school in the county, but just the students at the participating schools, and only those students who filled out a survey.  Pay particular attention to the introduction to determine how representative the report is.
3. To see a listing of schools that participated in 2008-2020, visit our school participation page.

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2020 County Reports

All publicly available county reports are listed below and contain the full array of questions asked on the IYS. For a snapshot of substance use for Illinois counties, see our 2020 IYS County Snapshot.