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.
McHenry County, Illinois, has about 316,000 residents (2024 Census Bureau estimate). The title to a parcel in McHenry County 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 or the county. This guide says who keeps each record and where the page for each office is.
This guide covers deeds, assessed values, directory links, city permits, evictions and court cases, records requests and common questions.
Related guides: McHenry County public records, McHenry County arrest records, McHenry County warrants, McHenry County inmate search, McHenry County criminal records, Illinois arrest records and Illinois inmate search.
Deeds, Mortgages and Liens in McHenry County
Who owns a parcel in McHenry County 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 McHenry County
What a parcel in McHenry County is taxed on is the business of the Supervisor of Assessments, which also 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.
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)
Permits and City Records in the Cities of McHenry County
Building permits, zoning and code cases inside a city are the city's own records. The cities in McHenry County with a SearchSystems guide to their offices, with the city page SearchSystems verified:
- Crystal Lake: the city hall page SearchSystems verified is at crystallake.org/our-community/resident-information, phone (815) 459-2020 (verified September 25, 2026).
- Huntley: the city hall page SearchSystems verified is at huntley.il.us (verified September 25, 2026).
- Marengo: the city hall page SearchSystems verified is at cityofmarengo.com/clerks-office, phone 815.568.7112 (verified September 26, 2026).
Evictions and Court Cases About Land in McHenry County
Court cases about land from McHenry County, 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.
Frequently Asked Questions
Who records deeds in McHenry County?
The County Recorder, at mchenrycountyil.gov, phone (815) 334-4110. Deeds, mortgages and liens on land in McHenry County 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 McHenry County?
The Supervisor of Assessments, whose page SearchSystems verified is at mchenrycountyil.gov/departments/assessments.
Where are evictions from McHenry County 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 McHenry 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.