Williamson County, IL Property Records
Property records in Williamson, Illinois, document ownership, transfers, valuations, and legal interests in real estate within Williamson County. These records may include deeds, mortgages, liens, plats, parcel details, property tax information, and assessment history. They are useful for confirming ownership, researching property boundaries, reviewing tax obligations, supporting real estate transactions, and conducting title or historical research. Users can access official Williamson property records through the Williamson County Clerk and Recorder’s Office and related county offices, with online resources available through the official property records section of the Williamson County government website.
Williamson County, IL Property Records & Statistics
Williamson County has a large renter population and housing costs slightly above the state median for rent. The median rent is $773.50, just above the Illinois median of $762 and below the national median of $840.25. Renter-occupied housing accounts for 29.22% of occupied homes, well above the state's 18.61% and the national 21.81%, which points to an active rental market.
The median home value is $105,200, below the state median of $116,950 and well below the national median of $173,750. The median property tax rate is 1.56%, lower than the Illinois rate of 1.8% but more than twice the national rate of 0.74%, so owners still pay a notable share of their home's value in taxes.
The median household income is $55,272, below the state figure of $65,699.50 and the national figure of $65,108. Lower incomes may help explain why renting is so common. The unemployment rate is 2.78%, a little lower than both the Illinois rate of 2.92% and the national rate of 2.87%.
Overall, the county has affordable home prices, moderate property taxes, a high share of renters, incomes below average, and employment slightly stronger than the state and nation.
Median Rent
Median Property Tax Rate
Median Home Value
Median Income
Unemployment Rate
Renter Occupied Housing
Property Records, Assessments, and Valuations in Williamson
Williamson County property records include tax assessments, property valuations, and foreclosure filings. The county has 51,028 total parcels, including 39,131 residential and 2,950 commercial parcels, with tax records covering 90.91% of the population and the latest assessment year of 2024. Valuation data is available for 24,907 properties, and foreclosure records include 4,499 notices of sale.
| Key Data | Details |
|---|---|
| Total Parcels | 51,028 |
| Residential Parcels | 39,131 |
| Commercial Parcels | 2,950 |
| Tax Record Coverage | 90.91% |
| Tax Year | 2023 |
| Assessment Year | 2024 |
| Properties with Valuation Data | 24,907 |
| Latest Valuation Update | August 19, 2025 |
| Lis Pendens Records | 629 |
| Notice of Sale Records | 4,499 |
Assignment and Release Records
Assignment and release records follow a mortgage after it is recorded. An assignment documents the transfer of a mortgage from one lender to another, and a release documents that the loan was paid off and the lien removed from the property.
Williamson County has 27,789 assignment and release records, including 3,122 assignment documents, 24,664 release documents, and 3 other documents. Assignments were recorded from June 5, 2017, to August 28, 2025, and releases from May 30, 2017, to August 28, 2025.
These records help buyers, owners, and title researchers see who holds a mortgage, confirm that earlier loans were satisfied, and follow a loan as it moved between lenders. Reviewing them before a sale or refinance can show liens that may still be open.
How to Search Williamson County, IL Property Records
Williamson County property records are handled by the Williamson County Clerk & Recorder in Marion, which holds recorded deeds, mortgages, and other land documents. The county has 51,028 parcels, with an assessment year of 2024 and tax information for 2023.
The Williamson County Clerk & Recorder page is the official resource for the office's services, contact details, and records search information. Use it to learn how to look up or request deeds, mortgages, and other recorded instruments.
To search, gather the property address, the owner's name, or the parcel number. Follow the options on the Clerk & Recorder page, enter the most complete details you have, and review the results for your property. Records can show ownership, parcel details, and valuation information.
The office is at 407 N Monroe, Marion, IL 62959, open Monday through Friday, 8:00 AM to 4:00 PM. You can also call 618-998-2110.
Williamson Registrar of Deeds
The Williamson County Probate Office is located at 407 N Monroe, Marion, IL, 62959 and can be reached at 618-998-2110. Office hours are Monday-Friday 8:00 AM – 4:00 PM. Records can be accessed through williamsoncountyil.gov or the official website williamsoncountyil.gov.
Williamson County Clerk & Recorder
Williamson County Property Records FAQ
How can I search Williamson County property records by address?
Start with the Williamson County Clerk & Recorder page to see the available search options. Have the full street address ready, and try a shorter version if nothing appears. You can also call 618-998-2110 for help.
How can I find property owners in Williamson County?
Owners are identified through the county's assessment records and recorded deeds. Contact the Clerk & Recorder at 407 N Monroe, Marion, or call 618-998-2110, and ask how to look up the owner of a parcel by address or parcel number.
How can I check a property's assessed value in Williamson County?
Williamson County's records reflect the 2024 assessment year, with the latest assessor update on August 20, 2025. To confirm the assessed value of a specific parcel, call the Clerk & Recorder at 618-998-2110 and ask which county office handles assessments for your parcel.
Where can I find Williamson County property tax bills and payment records?
Tax records in the county reflect tax year 2023. For help finding a bill or payment history, call the Clerk & Recorder at 618-998-2110 and ask for the right contact. Your parcel number or the owner's name will speed up the search.
How can I find deeds and other recorded documents in Williamson County?
Deeds, mortgages, and other recorded documents are handled by the Clerk & Recorder. See the Williamson County Clerk & Recorder page or visit 407 N Monroe, Marion, Monday through Friday, 8:00 AM to 4:00 PM.
Where can I access Williamson County parcel maps and GIS information?
The county has 51,028 parcels. For parcel maps and GIS information, call the Clerk & Recorder at 618-998-2110 and ask which county office maintains them. A parcel number from a deed or tax bill helps staff direct you to the right map.
How can I check permits and zoning information in Williamson County?
Permit and zoning requirements depend on where the property is located. Call the Clerk & Recorder at 618-998-2110 to be directed to the right county office, and for properties inside Marion or another city, check with that city about its own rules.
How can I create a list of property owners in Williamson County?
Online tools are generally built for single-property lookups. For a larger list or bulk records, contact the Clerk & Recorder at 618-998-2110 to ask what is available, and see the county page for office information.