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 9, 2026.
Jefferson County, Illinois, has about 36,000 residents (2024 Census Bureau estimate). The title to a parcel in Jefferson 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, directory links and common questions.
Related guides: Jefferson County public records, Jefferson County arrest records, Jefferson County warrants, Jefferson County inmate search, Jefferson County criminal records, Illinois arrest records and Illinois inmate search.
Deeds, Mortgages and Liens in Jefferson County
Deeds, mortgages, liens and easements that affect title to land in Jefferson County are recorded by the County Recorder, which indexes them by name and sells copies.
SearchSystems opened and checked the County Recorder's page at jeffersoncounty.illinois.gov/services/county_clerk___recorder/recor... (page title: Jefferson County), phone 618-244-8020, 100 S. 10th St., Room 105, Mt. Vernon, IL 62864, which answered when SearchSystems opened it on September 30, 2026.
Assessed Values and the Tax Roll in Jefferson County
The Supervisor of Assessments sets the value each parcel in Jefferson 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 jeffersoncounty.illinois.gov/services/assessor/index.php (page title: Jefferson County), phone 618.244.8016, which answered when SearchSystems opened it on September 30, 2026.
Evictions and Court Cases About Land in Jefferson County
Court cases about land from Jefferson County, evictions among them, are filed in the Circuit Court of Jefferson County.
The court records page SearchSystems verified for the county is at jeffcocircuitclerk.illinois.gov/yourcourtinfo.
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 Jefferson County
The SearchSystems directory, online since 1997, lists the official pages for Jefferson County and Illinois. These property pages from its Jefferson County listing were opened again on October 2, 2026 and each one still answers:
- Useful Links (jeffersoncounty.illinois.gov)
Frequently Asked Questions
Who records deeds in Jefferson County?
The County Recorder, at jeffersoncounty.illinois.gov, phone 618-244-8020. Deeds, mortgages and liens on land in Jefferson County are filed there, and the Supervisor of Assessments (jeffersoncounty.illinois.gov) has the assessment records.
Who sets the assessed value of a property in Jefferson County?
The Supervisor of Assessments, whose page SearchSystems verified is at jeffersoncounty.illinois.gov.
Where are evictions from Jefferson County filed?
In the Circuit Court of Jefferson 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 Jefferson 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.