Location guide · Cook County, IL
Find a property owner in Cook County, Illinois
Cook County takes in Chicago and the surrounding area. In Illinois, deeds are recorded by the county recorder or county clerk, and property is assessed by the township or county assessor. Those offices give you the owner of record and mailing address one parcel at a time; for a whole list, an owner-data tool returns owners, phones (DNC flagged) and emails in one pass.
What's on a Cook County property record
- The recorded owner name (person or LLC)
- The mailing address (often different from the property location for absentee owners)
- Assessed value and tax history
- Property characteristics (lot size, year built where applicable, square footage)
- A link to the recorded deed in most counties
Working Cook County records
Official sources used for Chicago addresses:
- Cook County Assessor's Office — Property characteristics and assessed values by address or Property Index Number (PIN).
- Cook County Clerk – recordings search — Recorded deeds, mortgages and liens. The Clerk took over the former Recorder of Deeds office in December 2020.
Search by the 14-digit Property Index Number (PIN); the Assessor, Treasurer and Clerk all key their records to it.
Record searches give you a name and a mailing address, not a phone number. Plan a second step to get phones and emails, and screen them against Do Not Call before you dial.
Common questions
How do I find the owner of a property in Cook County?
The Cook County property appraiser or assessor website publishes the recorded owner name and mailing address for every property in the county at no charge. For a list of addresses, an owner-data tool resolves each one directly to the verified owner with phones (DNC flagged) and emails.
Where do I find Cook County property records?
Assessment and owner-of-record data come from the township or county assessor; recorded deeds, mortgages and liens are with the county recorder or county clerk. Most Cook County offices offer an online search by address or parcel number.
Is it legal to look up property owners in Cook County?
Yes. Illinois deed and assessment records are public. Calling or texting the owner is a separate question: the federal TCPA and the Do Not Call registry apply, so screen numbers before you dial.