Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Try the next-generation Data Catalog at catalog-beta.data.gov and help shape it with your feedback.

  • Feedback
    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    Assessor - Parcel Addresses

    Metadata Updated: April 12, 2026

    Situs and mailing addresses of Cook County parcels. Used by the Assessor's office to mail assessment notices.

    This dataset was updated in March 2026 to include both owner and taxpayer information. Please note that owner name and mailing address is, to our knowledge, only intermittently updated in the ias source data. Users can use Parcel Sales data to query owner and seller names.

    When working with Parcel Index Numbers (PINs) make sure to zero-pad them to 14 digits. Some datasets may lose leading zeros for PINs when downloaded.

    Additional notes:

    • Newer properties may be missing a mailing or property address, as they need to be assigned one by the postal service.
    • Rowcount for a given year is final once the Assessor has certified the assessment roll all townships.
    • Data will be updated monthly.

    For more information on the sourcing of attached data and the preparation of this dataset, see the Assessor's Standard Operating Procedures for Open Data on GitHub.

    Read about the Assessor's 2025 Open Data Refresh.

    Access & Use Information

    Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

    Downloads & Resources

    Dates

    Metadata Created Date June 4, 2023
    Metadata Updated Date April 12, 2026

    Metadata Source

    Harvested from cookcountyil json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date June 4, 2023
    Metadata Updated Date April 12, 2026
    Publisher datacatalog.cookcountyil.gov
    Maintainer
    Identifier https://datacatalog.cookcountyil.gov/api/views/3723-97qp
    Data First Published 2026-03-23
    Data Last Modified 2026-04-07
    Category Property & Taxation
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://datacatalog.cookcountyil.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 46b1c37b-50b2-4e6f-b53b-901fe1e1c1af
    Harvest Source Id d52781fd-51ef-4061-9cd2-535a0afb663b
    Harvest Source Title cookcountyil json
    Homepage URL https://datacatalog.cookcountyil.gov/d/3723-97qp
    Source Datajson Identifier True
    Source Hash f9c0cc592aa82e35566f7da0d88fe50132c14c9db466314c042d5dcb780d9a0c
    Source Schema Version 1.1

    Didn't find what you're looking for? Suggest a dataset here.