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 on September 23, 2026.
Mercer County, Illinois, has about 15,000 residents (2024 Census Bureau estimate). The title to a parcel in Mercer 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: Mercer County public records, Mercer County arrest records, Mercer County warrants, Mercer County inmate search, Mercer County criminal records, Illinois arrest records and Illinois inmate search.
Deeds, Mortgages and Liens in Mercer County
Who owns a parcel in Mercer 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 mercercountyil.org/deparments/county_clerk_recorder.php (page title: MERCER COUNTY, IL), phone (309) 582-7021, 100 SE 3rd Street Aledo, IL 61231, which answered when SearchSystems opened it on September 23, 2026.
Assessed Values and the Tax Roll in Mercer County
The Supervisor of Assessments sets the value each parcel in Mercer 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.
Evictions and Court Cases About Land in Mercer County
An eviction, a foreclosure, a lien dispute or a quiet title suit is a court case in the Circuit Court of Mercer County, and the file is public unless sealed.
The court records page SearchSystems verified for the county is at illinoiscourts.gov/courts-directory/104/Mercer-County-Courthouse/court, phone (309) 582-7122. That page belongs to a lower court, not to the Circuit Court of Mercer 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. The county records request page SearchSystems verified is at mercercosheriff.org/foia/index.php (page title: Mercer County Sheriff, IL).
More Official Property and Land Records Pages for Mercer County
The SearchSystems directory, online since 1997, lists the official pages for Mercer County and Illinois. These property pages and recorded document pages from its Mercer County listing were opened again on October 2, 2026 and each one still answers:
- Mercer County Property Tax Inquiry (merceril.devnetwedge.com)
- The Mercer County Supervisor of Assessment Office (mercercountyil.org)
- MERCER COUNTY, IL (mercercountyil.org)
Frequently Asked Questions
Who records deeds in Mercer County?
The County Recorder, at mercercountyil.org, phone (309) 582-7021. Deeds, mortgages and liens on land in Mercer County are filed there.
Who sets the assessed value of a property in Mercer County?
The Supervisor of Assessments.
Where are evictions from Mercer County filed?
In the Circuit Court of Mercer 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 Mercer 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.