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Situs and mailing addresses for Cook County parcels, used by the Assessor's office to mail assessment notices. The dataset includes both owner and taxpayer information and was updated in March 2026. Data is updated monthly and maintained by the Cook County Assessor's office.
Parcel Index Numbers (PINs) must be zero-padded to 14 digits; some downloads may lose leading zeros. Owner name data is intermittently updated.
| # | Column Name |
|---|---|
| 1 | mailing_state |
| 2 | tax_year |
| 3 | pin10 |
| 4 | property_address |
| 5 | pin |
| 6 | property_state |
| 7 | mailing_name |
| 8 | mailing_address |
| 9 |
| owner_state |
| 10 | owner_zip |
| 11 | row_id |
| 12 | mailing_city |
| 13 | property_city |
| 14 | property_zip |
| 15 | mailing_zip |
| 16 | owner_name |
| 17 | owner_address |
| 18 | owner_city |