Search Williamson County Tax Records

Williamson County property tax records are managed by the treasurer, assessor, and county clerk in Marion. Located in southern Illinois, Williamson County is home to about 66,876 people and includes the cities of Marion, Herrin, and Carterville. You can search tax bills, check assessed values, and view payment history for any parcel in the county through the online portal. The treasurer's office at the courthouse in Marion handles all tax collections while the supervisor of assessments determines property values that form the base for annual tax bills.

Williamson County Treasurer

Ashley Gott serves as the Williamson County Treasurer. The office is at 407 N Monroe St, Suite 104, Marion, IL 62959. Call (618) 998-2142 ext 5665 for help with your tax bill or payment. You can also email treasurer@williamsoncountyil.gov. The office is open Monday through Friday, 8am to 4pm.

The Williamson County Treasurer page has details on payment options and due dates. Property taxes in Williamson County are paid in two installments each year. If you miss a due date, interest starts at 1.5% per month under 35 ILCS 200. The treasurer's office can set up payment plans in some cases, so call and ask if you need help catching up.

The Illinois Property Tax Code found in the state statutes at the Illinois General Assembly website shows how property tax records are collected across the state.

You can pay at the office in person with cash, check, or money order. Some online payment options may be available through the county website. Call ahead to check which methods work for your situation.

Williamson County Online Tax Search

The Williamson County tax search portal lets you look up property tax records by name, address, or parcel number. This tool is free. Note that the site may go down from time to time. If it is not loading, try again later or contact the treasurer's office.

When the portal is up, you can see current and past tax bills for any parcel. The results break down charges by taxing district. School districts, fire protection, park districts, and other local bodies all show up on the bill. This level of detail helps you see exactly where your tax money goes in Williamson County.

You can also see the assessed value and any exemptions applied to the property. If you need a printed copy of a tax bill, the treasurer's office can provide one. Walk-in requests are handled during regular office hours at the courthouse in Marion.

Property Assessments in Williamson County

The Williamson County Supervisor of Assessments is in Suite 205 at the courthouse. Call (618) 998-2189 for questions about your assessed value. The Williamson County assessments page explains how values are set and what options you have if you disagree.

Like most Illinois counties, Williamson County assesses property at 33.33% of fair market value. A home worth $150,000 on the open market would have an assessed value near $50,000. The Illinois Department of Revenue applies an equalization factor each year to keep values consistent across the state. Your actual tax bill uses the equalized assessed value. This system is set up by 35 ILCS 200 and works the same way in all 102 counties except Cook.

Farm property in Williamson County follows a different formula. Illinois uses soil productivity ratings to value agricultural land. This usually results in lower assessments for farmland compared to what the same acreage would be worth as residential or commercial property. The assessor's office handles these valuations based on state guidelines.

Property Tax Appeals

If you believe your property is assessed too high in Williamson County, you have the right to appeal. Start by contacting the local Board of Review. Bring evidence such as recent sales of similar properties or an independent appraisal. The board will review your case and decide if a change is needed.

If the local board does not rule in your favor, you can take the appeal to the Illinois Property Tax Appeal Board. PTAB handles cases from all 102 counties. The appeal process creates records that become part of your property's tax file in Williamson County. Keep in mind that appeal deadlines are strict, so file as soon as you get your assessment notice.

Tax Exemptions in Williamson County

Several exemptions can lower your Williamson County property tax bill. You apply through the assessor's office. Once approved, they show up on your tax record and reduce your bill each year. Common exemptions in the county include:

• General homestead: up to $6,000 off your equalized assessed value
• Senior homestead (65+): up to $8,000 additional reduction
• Senior freeze: locks your EAV if income qualifies
• Disabled veterans: reduction based on disability rating

The homestead exemption is the most widely used. If you own and live in your home, you likely qualify. Apply at the assessor's office in the Williamson County courthouse. Some exemptions must be renewed each year, while others carry forward until your situation changes.

Delinquent Taxes and Tax Sales

When Williamson County property taxes go unpaid, the county holds an annual tax sale. At the sale, investors bid on delinquent parcels by paying the back taxes. The owner then has a redemption period under 35 ILCS 200 to pay the amount plus interest and fees. This period is usually two to three years for residential property.

Tax sale records are public. They show which parcels went to sale, how much was paid, and whether redemption happened. These records are part of the Williamson County property tax file for each parcel. Before buying any property in the county, it is wise to check for delinquent taxes or tax sale history. Unpaid taxes stay with the land, not the person who owed them.

Cities in Williamson County

Williamson County includes Marion, Herrin, Carterville, and other smaller communities. None of these cities has a population over 50,000. All property tax records for cities in Williamson County are managed by the county treasurer and assessor in Marion.

Nearby Counties

These counties sit next to Williamson County. Double-check which county your property falls in before searching for tax records. Records are stored by the county where the land is located.