Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. The arrest counts are the ones each agency reported to the FBI, as the FBI held them on October 8, 2026. The jail figures are from the Vera Institute of Justice's Incarceration Trends data. Every office link was opened and checked against the office's own site between September 23, 2026 and September 28, 2026.
DuPage County, Illinois, has about 937,000 residents (2024 Census Bureau estimate). A DUI arrest in DuPage County starts two cases, a criminal case in the Circuit Court of DuPage County and a license case before the Secretary of State, and leaves three records. This guide follows the arrest from the roadside to the court file and the driving record.
This guide covers the law, the arrest, booking, the court case, the license case, the records and common questions.
Related guides: DuPage County public records, DuPage County arrest records, DuPage County warrants, DuPage County inmate search, DuPage County criminal records, Illinois arrest records and Illinois inmate search.
The DUI Law in Illinois
In Illinois the offense is DUI, and the limit is 0.08.
Driving in Illinois is consent to a breath or blood test when an officer has cause to suspect DUI; the license case that follows a refusal or a failed test is run by the Secretary of State, separately from the criminal case.
Illinois sets no time limit on prior offenses: every earlier conviction counts toward a repeat charge.
Who Makes DUI Arrests in DuPage County
The DuPage County Sheriff's Office and the agencies that report for Naperville, Wheaton, Downers Grove, Elmhurst, Lombard, Bartlett and 24 more cities make the DUI arrests in DuPage County.
The FBI's agency list also places two other agencies and two campus police departments in DuPage County (the arrest records guide names each one).
Together, the 27 agencies in DuPage County with all twelve months of 2025 on file reported 6,532 arrests to the FBI that year, all offenses together; the FBI's count for DuPage County does not break DUI out.
The Hanover Park Police Department, the St. Charles Police Department, the Bolingbrook Police Department and two more are each listed by the FBI across several counties including DuPage County, so their arrests are not broken out for DuPage County here.
Booking After a DUI Arrest in DuPage County
A driver arrested for DUI and kept in custody goes to the county jail, whichever agency made the arrest. The jail, run by the DuPage County Sheriff's Office, held about 490 people on an average day in 2022 by the Vera Institute of Justice's count and has a jail page SearchSystems verified at dupagesheriff.org. The DuPage County inmate search guide covers the jail in full.
The Court Case
A DUI charge from DuPage County is brought by the State's Attorney in the Circuit Court of DuPage County.
The State's Attorney's page SearchSystems verified is at dupagecounty.gov, phone 630-407-8000.
The court records page SearchSystems verified for the county is at dupagecircuitclerk.gov.
Illinois has no single public index of every trial court case; each court's records are looked up through that court.
The License Case
The court case is only half the record. The Secretary of State runs a separate administrative case over the license, which can suspend it before the criminal case is decided, and the Illinois Secretary of State keeps the driving record the conviction goes on.
The Records a DUI Leaves
- The arrest report: from the agency that made the arrest, under the Illinois Freedom of Information Act.
- The court file: from the Circuit Court of DuPage County, kept by the Circuit Clerk.
- The driving record: from the Illinois Secretary of State.
More on each: DuPage County arrest records, DuPage County police reports and DuPage County court records.
Frequently Asked Questions
What is the DUI limit in Illinois?
0.08 percent blood alcohol.
Where is a DUI case from DuPage County heard?
In the Circuit Court of DuPage County, brought by the State's Attorney. The court records page SearchSystems verified for the county is at dupagecircuitclerk.gov.
Where is a person arrested for DUI in DuPage County held?
At the county jail, run by the DuPage County Sheriff's Office, if kept in custody.
Who handles the license after a DUI arrest in Illinois?
The Secretary of State, in an administrative case separate from the court case.
How long does a DUI count as a prior in Illinois?
There is no time limit; every prior conviction counts.
Is this the official DuPage County website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official county, court and state offices described above and does not hold records, charge for them or take requests.