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.
Mason County, Illinois, has about 13,000 residents (2024 Census Bureau estimate). The title to a parcel in Mason 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: Mason County public records, Mason County arrest records, Mason County warrants, Mason County criminal records, Mason County court records, Illinois arrest records and Illinois inmate search.
Deeds, Mortgages and Liens in Mason County
Who owns a parcel in Mason 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 masoncountyil.gov/county-clerk (page title: County Clerk | Mason County, IL), phone 309-543-6661, which answered when SearchSystems opened it on September 23, 2026.
Assessed Values and the Tax Roll in Mason County
The Supervisor of Assessments sets the value each parcel in Mason 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 masoncountyil.gov/assessment (page title: Assessment | Mason County, IL), phone 309-543-4775, 125 N. Plum St Havana, IL 62644-0077, which answered when SearchSystems opened it on September 23, 2026.
Evictions and Court Cases About Land in Mason County
Court cases about land from Mason County, evictions among them, are filed in the Circuit Court of Mason County.
The court records page SearchSystems verified for the county is at illinoiscourts.gov/courts-directory/101/Mason-County-Courthouse/court, phone (309) 543-6619. That page belongs to a lower court, not to the Circuit Court of Mason 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 Mason County
The SearchSystems directory, online since 1997, lists the official pages for Mason County and Illinois. These property pages from its Mason County listing were opened again on October 2, 2026 and each one still answers:
- Mason County Property Tax Inquiry (masonil.devnetwedge.com)
Frequently Asked Questions
Who records deeds in Mason County?
The County Recorder, at masoncountyil.gov/county-clerk, phone 309-543-6661. Deeds, mortgages and liens on land in Mason County are filed there, and the Supervisor of Assessments (masoncountyil.gov/assessment) has the assessment records.
Who sets the assessed value of a property in Mason County?
The Supervisor of Assessments, whose page SearchSystems verified is at masoncountyil.gov/assessment.
Where are evictions from Mason County filed?
In the Circuit Court of Mason 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 Mason 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.