Illinois Property Tax Records
Illinois property tax records are public documents kept by county offices across the state. Each of the 102 counties in Illinois has a treasurer, assessor, and clerk who all play a role in the property tax process. You can search these records online in most counties through tax portals and search tools. The Illinois Department of Revenue does not collect property taxes directly. Instead, local governments handle every step from assessment to collection. Whether you need to look up a tax bill, check an assessed value, or find payment history, Illinois property tax records are available through county treasurer websites, in-person visits, or by mail. Most counties now use the DevNet wEdge system for online property tax searches, making it easier than ever to find what you need from home.
Illinois Property Tax Records Quick Facts
How Illinois Property Tax Records Work
Property tax in Illinois follows a cycle that spans two years. The tax year is the year of assessment. It reflects the value of real property as of January 1 of that year. The actual tax bills go out the next year. So taxes for 2024 get billed and collected in 2025. This is what "taxes paid in arrears" means in Illinois. Every property gets a Property Index Number, or PIN. Under 35 ILCS 200/1-130, this PIN is the number used to identify a parcel for assessment and tax purposes. You need the PIN to look up property tax records in most Illinois counties.
The assessment level in Illinois is 33.33% of fair market value for most of the state. Cook County is the big exception. Residential property in Cook County gets assessed at 10% of market value. Commercial and industrial properties there are assessed at 25%. These rates affect how much tax you owe. The county assessor or township assessor sets the value. The county clerk then applies tax rates from all the local taxing districts. The treasurer sends out the bills and collects the tax. Each of these steps creates records you can look up in Illinois.
Tax bills in Illinois typically come in two installments. The first is usually due in early June. The second is due in early September. Due dates vary a bit by county. If you miss a payment, state law requires a penalty of 1.5% per month on the unpaid balance. Late property tax records show up in the county system too.
Where to Search Illinois Property Tax Records
The Illinois Department of Revenue property tax page is a good place to start. It has links to county resources and explains how the system works at the state level. But IDOR does not have a statewide search tool for individual property tax records. You need to go to each county for that. The good news is that most Illinois counties now have online search portals.
You can search Illinois property tax records on the Illinois Property Tax Public Inquiry site, which covers many counties. This tool lets you look up tax information by address or PIN. It pulls data from county systems and shows assessed values, tax amounts, and payment status. For counties not on that site, you can go to the county treasurer or assessor website directly. The screenshot below shows what the IDOR property tax page looks like.
Most counties in Illinois use the DevNet wEdge system for their online tax search. You can look up property tax records by name, address, or parcel number on these portals. The search is free in most cases. You can see tax amounts, payment dates, and assessed values going back several years. Some county portals also let you pay your property tax bill online.
Illinois Property Tax Liens and Sales
The State Tax Lien Registry is an online system run by IDOR. It keeps notices of tax liens filed on real and personal property across Illinois. This is a statewide tool. Subscription fees apply: $500 for new access and $50 to renew within three months. Property tax records related to liens show up here after the county reports them to the state.
When property taxes go unpaid, the county holds a tax sale. This usually happens in October or November each year. At the sale, investors pay the delinquent taxes. The property owner then has 2 to 3 years to redeem the property by paying back the taxes plus interest. Under 35 ILCS 200, interest on late payments runs at 1.5% per month. Tax sale records become part of the property tax record and show up in county search tools across Illinois.
Property Tax Appeals in Illinois
If you think your property is assessed too high, you can appeal. The first step is to file with your local Board of Review. Every county has one. You present facts showing your property is worth less than what the assessor says. The Board of Review looks at your case and makes a decision. All of this creates property tax records that you can search later.
If you are not happy with the Board of Review decision, you can take your case to the Illinois Property Tax Appeal Board. PTAB is a state agency that hears appeals from property owners across Illinois. The Springfield office is at 401 South Spring Street. You can also reach the Des Plaines office at (847) 294-4398. PTAB decisions are public records. They show what the property owner argued and what the board decided about the assessed value in Illinois.
Note: You must exhaust your local Board of Review options before filing with PTAB in Illinois.
Illinois Property Tax Code
The Illinois Property Tax Code (35 ILCS 200) is the main law that controls how property taxes work in the state. It covers everything from assessments to collections to appeals. The code sets the 33.33% assessment level and spells out how counties must handle tax bills. It also defines the rules for exemptions, tax sales, and redemption periods. When you search Illinois property tax records, the data you find is shaped by these laws.
The code also creates the framework for property tax exemptions. These include the General Homestead Exemption, Senior Citizens Homestead Exemption, Senior Citizens Assessment Freeze, and Disabled Persons Homestead Exemption. Each one reduces the taxable value of your property. Exemption records are part of your property tax file. You can see them when you look up your PIN in most county search systems across Illinois.
Online Tools for Illinois Property Tax Records
Several online tools help you find property tax records in Illinois. County portals are the most common. Cook County has its own system at cookcountypropertyinfo.com that lets you search by address or PIN. You can see billed amounts, tax history going back five years, exemptions, and payment status. Cook County also lets you pay online for free using a bank account through the treasurer site.
DuPage County runs its own lookup at propertylookup.dupagecounty.gov. It works much the same way. Type in an address or PIN and you get the tax details. Many other counties in Illinois use DevNet wEdge portals. These all work in a similar way: enter a name, address, or parcel number and get back property tax records including assessed values, tax amounts, and payment history.
Searching Property Tax Records by County
The Illinois Property Tax Public Inquiry tool covers a wide range of counties. It is not run by the state government but it pulls data from official county sources. You can search by address or PIN to find tax bills, assessed values, and payment records. The tool is free to use and works from any device. It is one of the easiest ways to start looking up Illinois property tax records if you are not sure which county site to use.
For the most complete and current data, go to the county treasurer or assessor site directly. Each county keeps its own records and updates them on its own schedule. Some counties post new data faster than others. If you need certified copies of property tax records in Illinois, you will need to contact the county office by phone, mail, or in person.
Browse Illinois Property Tax Records by County
Each county in Illinois has its own treasurer and assessor who keep property tax records. Pick a county below to find local contact info and search tools for property tax records in that area.
Property Tax Records in Major Illinois Cities
Property taxes in Illinois are collected at the county level. City residents pay their property taxes to the county treasurer. Pick a city below to find which county handles property tax records for that area.