Reviewed and updated October 9, 2026 by the SearchSystems.net editorial team. 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). The title to a parcel in Marengo is in the deed records of the County Recorder and its taxable value is set by the Supervisor of Assessments; what is built on it is a matter for the city. This guide says who keeps each record and where the page for each office is.
This guide covers deeds, assessed values, city permits and records, evictions and court cases, records requests, directory links and common questions.
Related guides: Marengo public records, McHenry County property records, Marengo arrest records, Marengo warrants, Marengo inmate search, Marengo criminal records, Illinois arrest records and Illinois inmate search.
Deeds, Mortgages and Liens in Marengo
Who owns a parcel in Marengo and what it sold for are in the deed records of the County Recorder, with every lien or mortgage against the land.
SearchSystems opened and checked the County Recorder's page at mchenrycountyil.gov/departments/county-recorder (page title: County Recorder | McHenry County, IL), phone (815) 334-4110, which answered when SearchSystems opened it on September 23, 2026.
Assessed Values and the Tax Roll in Marengo
The Supervisor of Assessments sets the value each parcel in Marengo is taxed on and keeps the parcel maps. Illinois assesses property at a third of market value; Cook County reassesses one third of the county each year and the rest of the state runs on four-year cycles.
SearchSystems opened and checked the Supervisor of Assessments' page at mchenrycountyil.gov/departments/assessments (page title: Assessments | McHenry County, IL), phone (815) 334-4290, 2200 North Seminary Ave Woodstock, IL 60098, which answered when SearchSystems opened it on September 23, 2026.
Permits and City Records in Marengo
Building permits, zoning and code cases are the city's own. For Marengo, SearchSystems opened and checked the city hall page at cityofmarengo.com/clerks-office (page title: CLERK’S OFFICE), phone 815.568.7112, 132 E. Prairie Street Marengo, IL 60152, which answered when SearchSystems opened it on September 26, 2026.
Evictions and Court Cases About Land in Marengo
Court cases about land from Marengo, evictions among them, are filed in the Circuit Court of McHenry County.
Asking a County Office for a Record
Under the Illinois Freedom of Information Act a county office must answer a request within 5 business days, with one 5-day extension, and it may charge copying only after the first 50 pages.
More Official Property and Land Records Pages for McHenry County
The SearchSystems directory, online since 1997, lists the official pages for McHenry County and Illinois. These property pages from its McHenry County listing were opened again on October 2, 2026 and each one still answers:
- Forms and Rules (mchenrycountyil.gov)
- McHenry County Property Tax Inquiry (mchenryil.devnetwedge.com)
Frequently Asked Questions
Who records deeds in Marengo?
The County Recorder, at mchenrycountyil.gov, phone (815) 334-4110. Deeds, mortgages and liens on land in Marengo are filed there, and the Supervisor of Assessments (mchenrycountyil.gov/departments/assessments) has the assessment records.
Who sets the assessed value of a property in Marengo?
The Supervisor of Assessments, whose page SearchSystems verified is at mchenrycountyil.gov/departments/assessments.
Where are evictions from Marengo filed?
In the Circuit Court of McHenry County. The file is public unless the court seals it.
How is property assessed in Illinois?
Illinois assesses property at a third of market value; Cook County reassesses one third of the county each year and the rest of the state runs on four-year cycles.
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.