Cook County, IL Property Records
Property records in Cook, Illinois document ownership, transfers, legal descriptions, assessed values, property taxes, mortgages, liens, and other recorded interests tied to real estate in Cook County. These records are useful for verifying ownership, researching a property’s history, reviewing tax and assessment details, preparing for a purchase or sale, and confirming whether recorded claims or encumbrances exist.
Users can access official Cook property records through Cook County government offices, including the Cook County Clerk’s recording division for deeds and other recorded documents, the Assessor’s Office for assessment information, and the Treasurer’s Office for tax records. For recorded real estate documents, start with the Cook County Clerk’s online official property records.
Cook County, IL Property Records & Statistics
Cook County is the most expensive and most renter-heavy housing market in Illinois. The median rent of $1,318 is far above the state's $762 and the national $840.25. The median home value of $285,000 is more than double the state figure of $116,950 and well above the national $173,750. Renter-occupied housing makes up 34.43% of occupied homes, compared with 18.61% statewide and 21.81% nationally, reflecting the density of Chicago and its inner suburbs.
The median property tax rate is 2.1%, above the state's 1.8% and nearly three times the national 0.74%. Applied to high home values, that rate produces some of the largest tax bills in the country, which is a major factor for owners and buyers.
The median household income is $80,976.50, well above the state's $65,699.50 and the national $65,108, which helps offset the cost of housing. The unemployment rate of 3.63% is higher than the state's 2.92% and the national 2.87%, showing that a large urban labor market can carry more joblessness even with strong incomes.
In short, Cook County pairs high rents, high home values, and heavy property taxes with above-average incomes and a large rental population.
Median Rent
Median Property Tax Rate
Median Home Value
Median Income
Unemployment Rate
Renter Occupied Housing
Property Records, Assessments, and Valuations in Cook
Cook County holds one of the largest property record collections in the country, covering assessments, recorded deeds and mortgages, valuations, and foreclosure filings. The county has 1,864,191 total parcels, including 1,556,699 residential and 119,781 commercial parcels, with tax records covering 93.02% of the population for the 2023 assessment year. The Recorder holds 4,596,439 deeds and 4,956,716 mortgages, and valuation data exists for 1,334,291 properties.
| Key Data | Details |
|---|---|
| Total Parcels | 1,864,191 |
| Residential Parcels | 1,556,699 |
| Commercial Parcels | 119,781 |
| Tax Record Coverage | 93.02% |
| Assessment Year | 2023 |
| Deed Records | 4,596,439 |
| Mortgage Records | 4,956,716 |
| Properties with Valuation Data | 1,334,291 |
| Latest Valuation Update | August 19, 2025 |
| Lis Pendens Records | 1,350,486 |
Assignment and Release Records
Assignment and release records follow a mortgage after it is recorded. An assignment shows that a loan was transferred from one lender or servicer to another, and a release shows that the mortgage was satisfied and the lien removed from the property.
Cook County has 5,745,791 assignment and release records. They include 1,009,060 assignment documents recorded from October 6, 1986, through August 29, 2025, and 4,726,980 release documents recorded from November 24, 1986, through August 29, 2025, along with 9,751 other documents.
In a county of this size, these records are essential for title work. They let buyers, attorneys, and researchers confirm that earlier mortgages on a property were paid off, trace a loan through several servicers, and find liens that remain open before a closing or refinance. The records stretch back almost four decades, which supports research on long ownership histories.
How to Search Cook County, IL Property Records
Cook County property records are spread across several offices. The Clerk's Recordings Division records deeds, mortgages, and other land documents, the Assessor sets property values, and the Treasurer handles property tax bills. Together they cover the county's 1,864,191 parcels, including ownership, assessments, taxes, and recorded transactions.
For recorded documents, use the Cook County Clerk's Recordings search. Background on services is on the Cook County Clerk's Recordings Division page, and recording forms are on the Cook County recording forms page. Assessment information is available from the Cook County Assessor's Office, and tax bills are handled by the Cook County Treasurer.
Begin with a parcel number or full address, which is the most reliable way to find a Cook County property, and search by owner name if you only have a name. Open the results to review recording dates, document types, and the parties named.
The Recordings Division is at 118 N. Clark Street, Chicago, open Monday through Friday, 8:00 AM to 4:00 PM, and can be reached at 312-603-5050.
Cook Registrar of Deeds
The Cook County Probate Office is located at 118 N. Clark Street, Chicago, IL, 60602 and can be reached at 312-603-5050. Office hours are Monday-Friday 8:00 AM – 4:00 PM. Records can be accessed through cookcountyclerkil.gov or the official website cookcountyclerkil.gov.
Cook County Clerk's Recordings Division
Cook County Property Records FAQ
How can I search Cook County property records by address?
For assessment details, use the Cook County Assessor's Office and search by address or parcel number. For recorded documents tied to the property, use the Cook County Clerk's Recordings search. If an address does not return a match, try the parcel number from a tax bill.
How can I find property owners in Cook County?
Start with the Cook County Assessor's Office to look up a parcel, then confirm the current owner through the most recent deed in the Clerk's Recordings search. The county has 4,596,439 deed records dating from January 2, 1998. The Recordings Division can be reached at 312-603-5050.
How can I check a property's assessed value in Cook County?
The Cook County Assessor's Office publishes assessments by parcel. The county's records reflect the 2023 assessment year, with a latest assessor update of February 24, 2025. Valuation data covers 1,334,291 properties. Have the address or parcel number ready, and contact the Assessor if you have a question about a specific value.
Where can I find Cook County property tax bills and payment records?
The Cook County Treasurer handles property tax bills and payments. Search with a parcel number or address to see bills and payment history. A parcel number is printed on any prior bill or deed. For recorded documents, such as deeds, use the Clerk's Recordings Division instead.
How can I find deeds and other recorded documents in Cook County?
Use the Cook County Clerk's Recordings search. The county has 4,596,439 deed records and 4,956,716 mortgage records recorded from January 2, 1998. For filing options, see the e-recording and mail instructions, or call 312-603-5050.
Where can I access Cook County parcel maps and GIS information?
Cook County has 1,864,191 parcels. Start with the Cook County Assessor's Office, which provides parcel information and property lookups, and ask staff if you need mapping layers. Parcel maps are a reference tool and do not replace a licensed survey when you need exact boundaries.
How can I check permits and zoning information in Cook County?
For unincorporated areas, the Cook County Department of Building and Zoning handles permits and zoning. Most of the county sits inside a municipality, such as Chicago or a suburb, and in that case the city or village building department governs the property, so contact that office for the address you are researching.
How can I create a list of property owners in Cook County?
Online searches return one property or name at a time, so a large owner list generally has to be requested. Contact the Cook County Clerk's Recordings Division at 312-603-5050 to ask what bulk recorded-document data is available, and check with the Assessor for parcel-level data. Fees may apply.