Datasets
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Assessor - Parcel Universe (Current Year Only)
A current-year-only universe of Cook County parcels with attached geographic, governmental, and spatial data. When working with Parcel Index Numbers (PINs) make sure to zero-pad... -
Assessor - Parcel Universe
A complete, historic universe of Cook County parcels with attached geographic, governmental, and spatial data. When working with Parcel Index Numbers (PINs) make sure to zero-... -
CCP Invoice Register
This dataset provides a cumulative record of payment and invoice details for County suppliers, vendors and other payees. Data is from December 1, 2016 to present. Payment data... -
Investor Relations - Bond Official Statements
The official statements below provide detailed information about the outstanding bonds issued by the County. The full faith and credit of the County is pledged to the punctual... -
Assessor - Permits
Historical permit data submitted by municipalities to the Cook County Assessor's Office. When working with Parcel Index Numbers (PINs) make sure to zero-pad them to 14 digits.... -
Cook County Check Register
This dataset provides a cumulative record of payment and invoice details for County suppliers, vendors and other payees. Data is from December 1, 2016 to present. Payment data... -
Assessor - Residential Condominium Unit Characteristics
Residential condominium unit characteristics collected and maintained by the Assessor's office for all of Cook County, from 1999 to present. The office uses this data primarily... -
Assessor - Parcel Addresses
Situs and mailing addresses of Cook County parcels. Used by the Assessor's office to mail assessment notices. As of 2017 mailing addresses in this dataset are no longer being... -
Medical Examiner Indigent Cremations
The following page lists the unclaimed indigents cremated by the Cook County Medical Examiner’s Office. -
Human Resources - Compliance Officer’s Quarterly Employment Action Reports
In order to ensure Cook County’s commitment to transparency, reports on employment actions and monitoring activities are available. As required under the Employment Plan, Cook... -
Procurement - Buying Plan - Fiscal Year 2025
As a public agency, the Office of the Chief Procurement Officer welcomes all vendors to participate in the open and competitive process. The buying plan contains hundreds of... -
Board of Review Appeal Decision History
Historic land, building, and total assessed values for all Cook County parcels appealed with the Board of Review, from 2010 to present. The Board of Review uses these values for... -
Board of Ethics - Notices of Determination
By ordinance, the investigations and considerations by the Board of Ethics of potential violations of the Ethics Ordinance are confidential. County Code, § 2-592. As a matter of... -
Inspector General - Employment Quarterly Action Reports
Pursuant to the Employment Plan, the OIIG prepares quarterly reports listing the total number of hires, promotions, transfers and terminations involving employees during the... -
Inspector General - Quarterly Reports
The Independent Inspector General submits a Quarterly Report to the President and the County Board. The Quarterly Report is released the 15th day of January, April, July, and... -
Metropolitan Water Reclamation District Inspector General Quarterly Reports
The Independent Inspector General submits Quarterly Reports to the MWRD Board of Commissioners and Executive Director. The Quarterly Report is released the 15th day of January,... -
Assessor - Commercial Valuation Data
Commercial valuation data collected and maintained by the Cook County Assessor's Office, from 2021 to present. The office uses this data primarily for valuation and reporting.... -
Board of Ethics - Advisory Opinions
By ordinance, the investigations and considerations by the Board of Ethics of potential violations of the Ethics Ordinance are confidential. County Code, § 2-592. As a matter of... -
Human Resources - Compliance Officer’s Semi-Annual Reports
These reports are issued every March 15th and September 15th. As required under the Employment Plan, Cook County Board President Toni Preckwinkle hired a Compliance Officer... -
Cook County Officials Dual Employment Disclosure Form
Pursuant to Section 2-573 of the Cook County Code of Ethics, officials that hold employment outside their elected office shall disclose such employment, or any change in...