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 September 30, 2026.
Johnson County, Illinois, has about 13,000 residents (2024 Census Bureau estimate). The title to a parcel in Johnson 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, evictions and court cases, records requests and common questions.
Related guides: Johnson County public records, Johnson County arrest records, Johnson County warrants, Johnson County criminal records, Johnson County court records, Illinois arrest records and Illinois inmate search.
Deeds, Mortgages and Liens in Johnson County
Who owns a parcel in Johnson County and what it sold for are in the deed records of the County Recorder, with every lien or mortgage against the land.
Assessed Values and the Tax Roll in Johnson County
The Supervisor of Assessments sets the value each parcel in Johnson County 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 johnsonil.devnetwedge.com (page title: Johnson County Property Tax Inquiry), which answered when SearchSystems opened it on September 30, 2026.
Evictions and Court Cases About Land in Johnson County
An eviction, a foreclosure, a lien dispute or a quiet title suit is a court case in the Circuit Court of Johnson County, and the file is public unless sealed.
The court records page SearchSystems verified for the county is at illinoiscourts.gov/courts-directory/93/Johnson-County-Courthouse/court, phone (618) 658-4751. That page belongs to a lower court, not to the Circuit Court of Johnson 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 Johnson County?
The County Recorder.
Who sets the assessed value of a property in Johnson County?
The Supervisor of Assessments, whose page SearchSystems verified is at johnsonil.devnetwedge.com.
Where are evictions from Johnson County filed?
In the Circuit Court of Johnson 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 Johnson 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.