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. Every office link was opened and checked against the office's own site between September 23, 2026 and October 2, 2026.
Marengo, Illinois, in McHenry County, has about 7,700 residents (2024 Census Bureau estimate). Its court cases are filed in the Circuit Court of McHenry County, and the file of each case, kept by the Circuit Clerk, is the public record of it. This guide says which court hears what, where to look a case up and who keeps the files.
This guide covers the courts, the records page, criminal cases, kinds of files and common questions.
Related guides: Marengo public records, McHenry County court records, Marengo arrest records, Marengo warrants, Marengo inmate search, Marengo criminal records, Illinois arrest records and Illinois inmate search.
The Courts That Hear Cases from Marengo
Court cases from Marengo are filed in the Circuit Court of McHenry County, which hears every civil, criminal, family, probate, traffic and juvenile case.
Divorces go to the Circuit Court's domestic relations division, and the file stays with the Circuit Clerk.
The Circuit Clerk keeps the files, and a copy of anything in a file comes from that office, under the court's own rules rather than the Illinois Freedom of Information Act.
Looking Up a Case from Marengo
The court records page SearchSystems verified for the county is at caseinfo.mchenrycountyil.gov/PublicCaseAccess (page title: Public Case Access), 2200 N. Seminary Ave Woodstock, IL 60098, a site that blocks automated checks (HTTP 403), so open it in a browser.
Illinois has no single public index of every trial court case; each court's records are looked up through that court.
The Illinois court page SearchSystems verified is at illinoiscourts.gov.
What Reaches the Court from Marengo
Together, the 21 agencies in McHenry County with all twelve months of 2025 on file reported 4,544 arrests to the FBI that year; the State's Attorney decides which of those arrests become cases in the Circuit Court of McHenry County.
The State's Attorney's page SearchSystems verified is at mchenrycountyil.gov/departments/state-s-attorney-s-office (page title: State's Attorney's Office | McHenry County, IL), phone (815) 334-4159, 2200 North Seminary Ave. Suite #150 Woodstock, IL 60098, which answered when SearchSystems opened it on September 23, 2026.
The Kinds of Court Files
The court file is one record with several readers: a criminal case from the arrest to the sentence, a divorce from the petition to the judgment, a traffic ticket from the citation to the conviction the court reports to the Illinois Secretary of State, and an eviction or a lien on land.
The other Marengo guides take the kinds of file one at a time: Marengo criminal records, Marengo divorce records, Marengo traffic tickets, Marengo DUI and Marengo property records.
Frequently Asked Questions
Which court hears felonies in Marengo?
The Circuit Court of McHenry County, which hears every civil, criminal, family, probate, traffic and juvenile case.
Who keeps the court records in Marengo?
The Circuit Clerk. Copies come from that office under the court's own rules.
Is there a statewide court case search in Illinois?
No. Each court's records are looked up through that court.
Is this the official Marengo website?
No. SearchSystems.net is an independent public records guide, online since 1997. It links to the official city, county, court and state offices described above and does not hold records, charge for them or take requests.