AndreaBozzo/ceres-open-data-index huggingface dataset:
Assessor - Property Tax-Exempt Parcels

Parcels with property tax-exempt status across all of Cook County per tax year, from Tax Year 2022 on, with geographic coordinates and addresses.

Properties of religious, charitable, and educational organizations, as well as units of federal, state and local governments, can be eligible for exemption from property taxes. The Illinois Department of Revenue (IDOR) ultimately grants qualified organizations with property tax exempt status, with additional administration by the Board of Review and/or Assessor.  Learn more <a href="https://www.cookcountyboardofreview.com/what-we-do/property-tax-exemptions" target=_new>here</a>, and see the Assessor's guidance for religious organizations <a href="https://www.cookcountyassessor.com/exemptions-religious-institutions" target=_new>here</a>.

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:<ul><li>Parcel entroids are based on <a href="https://datacatalog.cookcountyil.gov/Property-Taxation/ccgisdata-Parcel-2021/77tz-riq7">Cook County parcel shapefiles</a>.</li>
<li>Newer properties may be missing a mailing or property address, as they need to be assigned one by the postal service.</li>
<li>Exempt status for parcels changes regularly depending on the use and owner of a given parcel. Please contact Assessor.Exempt@cookcountyil.gov if you need additional information about parcels excluded from this dataset.</li>
<li>Data will be updated monthly.</li>
<li>This dataset contains data for the current tax year, which may not yet be complete or final. Assessed values and property tax-exempt status for any given year are subject to change until <a href="https://www.cookcountyassessor.com/assessment-calendar-and-deadlines">review and certification of values by the Cook County Board of Review</a>, though there are a few rare circumstances where values may change for the current or past years after that.</li>
<li>Rowcount for a given year is final once the Assessor <a href="https://www.cookcountyassessor.com/assessment-calendar-and-deadlines">has certified the assessment roll</a> all townships.</li>
<li>Current property class codes, their levels of assessment, and descriptions can be found <a href="https://prodassets.cookcountyassessor.com/s3fs-public/form_documents/classcode.pdf">on the Assessor's website</a>. Note that class codes details can change across time.</li></ul>
For more information on the sourcing of attached data and the preparation of this dataset, see the <a href="https://github.com/ccao-data/wiki/blob/master/SOPs/Open-Data.md">Assessor's Standard Operating Procedures for Open Data</a> on GitHub.

<a href="https://datacatalog.cookcountyil.gov/stories/s/gzdr-q7c4">Read about the Assessor's 2025 Open Data Refresh.</a>

Tags: cook-county-assessor, property-tax
Organization: Cook County of Illinois
Assessor - Assessed Values

Land, building, and total assessed values for all Cook County parcels, from 1999 to present. The Assessor's Office uses these values for reporting, evaluating assessment performance over time, and research.

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.

This data is parcel-level. Each row contains the assessed values for a single PIN for a single year. Important notes:<ul><li>Assessed values are available in three stages: 1) mailed, these are the initial values estimated by the Assessor's Office and mailed to taxpayers. 2) certified, these are values after the Assessor's Office closes appeals. 3) Board of Review certified, these are values after the Board of Review closes appeals.</li>
<li>The values in this data are assessed values, NOT market values. Assessed values must be adjusted by their <a href="https://prodassets.cookcountyassessor.com/s3fs-public/form_documents/classcode.pdf">level of assessment</a> to arrive at market value. Note that levels of assessment have changed throughout the time period covered by this data set.</li>
<li>This data set will be updated roughly contemporaneously (monthly) with the <a href="https://www.cookcountyassessor.com/">Assessor's website</a> as values are mailed and certified. However, note that there may be small discrepancies between the Assessor's site and this data set, as each pulls from a slightly different system. If you find a discrepancy, please email the Data Department using the contact link below.</li>
<li>This dataset contains data for the current tax year, which may not yet be complete or final. Assessed values for any given year are subject to change until <a href="https://www.cookcountyassessor.com/assessment-calendar-and-deadlines">review and certification of values by the Cook County Board of Review</a>, though there are a few rare circumstances where values may change for the current or past years after that.</li>
<li>Rowcount for a given year is final once the Assessor <a href="https://www.cookcountyassessor.com/assessment-calendar-and-deadlines">has certified the assessment roll</a> all townships.</li>
<li>Current property class codes, their levels of assessment, and descriptions can be found <a href="https://prodassets.cookcountyassessor.com/s3fs-public/form_documents/classcode.pdf">on the Assessor's website</a>. Note that class codes details can change across time.</li></ul>For more information on the sourcing of attached data and the preparation of this dataset, see the <a href="https://github.com/ccao-data/wiki/blob/master/SOPs/Open-Data.md">Assessor's Standard Operating Procedures for Open Data</a> on GitHub.

<a href="https://datacatalog.cookcountyil.gov/stories/s/gzdr-q7c4">Read about the Assessor's 2025 Open Data Refresh.</a>

Tags: cook-county-assessor, property-tax
Organization: Cook County of Illinois
Medical Examiner - Unclaimed Persons

This dataset contains our most up to date list of Unclaimed Persons found in Cook County.

If you feel you are the next of kin to any of the individuals listed, Please contact Rebeca Perrone, Indigent Coordinator, at 312-997-4480. During regular business hours: Monday through Friday, 7 a.m. to 3 p.m.

Statement of Public Notice: Unclaimed indigents will be cremated or buried at County expense within 60 days of admission to our facility as dictated by the Cook County Medical Examiner Ordinance

Organization: Cook County of Illinois
Diversion

This dataset is no longer actively maintained as of 12/30/2024. Please visit the site below to explore data dashboards published by the State’s Attorney’s Office beginning 2025.
<a href="https://www.cookcountystatesattorney.org/data-dashboards">Data Dashboards | Cook County State's Attorney</a>

The Diversion dataset contains information on defendants who receive a referral to a diversion program, including the type of program and date of referral; each row is a program to which a defendant has been referred.

Tags: fy2020, states-attorney, states-attorney-case-level
Organization: Cook County of Illinois
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 whose primary responsibilities include the following:

1. Overseeing compliance with the Employment Plan

2. Maintaining and reviewing the Exempt List

3. Accepting, investigating, and reporting on complaints related to Employment Actions and the Employment Plan

4. Taking steps to evaluate, eliminate, remedy and reporting instances of Political Contacts and Unlawful Political Discrimination; and

5. Training on Employment Plan and reviewing Policies and Procedures.

If you would like to make a complaint alleging non-compliance with the Employment Plan, a Complaint Form is available or you can contact the Compliance Officer directly.

Letitia Dominici, Compliance Officer 118 N. Clark Street, 8th Floor Chicago, IL 60602 Letitia.dominici@cookcountyil.gov

Organization: Cook County of Illinois
Dispositions

This dataset is no longer actively maintained as of 12/30/2024. Please visit the site below to explore data dashboards published by the State’s Attorney’s Office beginning 2025.
<a href="https://www.cookcountystatesattorney.org/data-dashboards">Data Dashboards | Cook County State's Attorney</a>

The disposition data presented in this data reflects the culmination of the fact-finding process that leads to the resolution of a case. Each row represents a charge that has been disposed of.

Tags: states-attorney, states-attorney-case-level
Organization: Cook County of Illinois
Comptroller - Annual Salaries - 2015 - November 24

Annual salaries paid to employees by the Cook County Comptroller as of November 24, 2015. This dataset does not include salaries for Cook County Forest Preserves. 

This dataset is no longer updated. Newer data is available at https://datacatalog.cookcountyil.gov/d/xu6t-uvny.

For 2014, see https://datacatalog.cookcountyil.gov/d/hdna-35se.

Tags: inactive, payroll
Organization: Cook County of Illinois
Initiation

This dataset is no longer actively maintained as of 12/30/2024. Please visit the site below to explore data dashboards published by the State’s Attorney’s Office beginning 2025.
<a href="https://www.cookcountystatesattorney.org/data-dashboards">Data Dashboards | Cook County State's Attorney</a>

The Initiation results data presented here reflects all of the arrests that came through the door of the State's Attorneys Office (SAO). An initiation is how an arrest turns into a “case” in the courts. Most cases are initiated through a process known as felony review, in which SAO attorneys make a decision whether or not to prosecute. Cases may also be indicted by a grand jury or, in narcotics cases, filed directly by law enforcement (labeled "BOND SET (Narcotics)" in this data). Included in this data set are the defendant counts by initiation and year. This data includes felony cases handled by the Criminal, Narcotics, and Special Prosecution Bureaus. It does not include information about cases processed through the Juvenile Justice and Civil Actions Bureaus.

Tags: states-attorney, states-attorney-case-level
Organization: Cook County of Illinois
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. Some datasets may lose leading zeros for PINs when downloaded.

Additional notes:<ul>
<li>Almost all of the data in this dataset, such as address, estimated date of completion, work description, and permit amount, is data submitted by municipalities to the CCAO. The CCAO verifies or corrects the PIN number, determines whether the work is assessable, updates the status of CCAO workflows (e.g., open or closed), and sets the recheck year.</li>

<li>In addition to permits that are already closed, this dataset includes permits that are <b>currently open or pending</b>. These permits are not final and are subject to change.</li>
<li>Data will be updated monthly.</li></ul>
<li>Rows are unique by the combination of "pin", "permit_number", and "date_issued".</li>
<li>Job codes and improvement codes are not correct in all cases. Consider "work_description" to be the canonical description of the work that the permit describes.</li>
<li>In many past cases permits have been submitted in irreconcilably different formats by different municipalities, or not at all. As such, this dataset does not represent the complete universe of permits in all municipalities, but rather represents the universe of permits that the CCAO knows about.</li>
<li>Each row represents a parcel and a permit that is associated with that parcel. Permits may be associated with multiple parcels, and parcels may be associated with multiple permits.</li>
<li>"date_issued" is more reliable than "date_submitted". Prefer "date_issued" when making temporal comparisons between parcels.</li>
<li>Data for the current tax year may not yet be complete or final.</li>

For more information on the sourcing of attached data and the preparation of this dataset, see the <a href="https://github.com/ccao-data/wiki/blob/master/SOPs/Open-Data.md">Assessor's Standard Operating Procedures for Open Data</a> on GitHub.

<a href="https://datacatalog.cookcountyil.gov/stories/s/gzdr-q7c4">Read about the Assessor's 2025 Open Data Refresh.</a>

Tags: cook-county-assessor, property-tax
Organization: Cook County of Illinois
OHNA Housing Equity Indicators Dashboard V2.0 Methodology Report

Methodology report for the April 2026 publication of the Oregon Housing Needs Analysis (OHNA) Housing Equity Indicators Dashboard.

Oregon Revised Statute (ORS) 456.602 outlines a set of statewide housing equity indicators that Oregon Housing and Community Services (OHCS) must publish to support the Oregon Housing Needs Analysis (OHNA). The ORS states that OHCS shall produce a set of housing equity indicators for each city with more than 10,000 population.

Organization: State of Oregon
Intake

This dataset is no longer actively maintained as of 12/30/2024. Please visit the site below to explore data dashboards published by the State’s Attorney’s Office beginning 2025.
<a href="https://www.cookcountystatesattorney.org/data-dashboards">Data Dashboards | Cook County State's Attorney</a>

The intake data presented in this data reflects the cases brought in for review. Each row represents a potential defendant in a case.

Tags: states-attorney, states-attorney-case-level
Organization: Cook County of Illinois
Procurement - Bid Tabulations

The bid tabulations provided herein are preliminary and are for informational purposes only. The purpose of providing this preliminary information is to improve process transparency. The information contained in the preliminary bid tabulations is subject to change pending math review, analysis of all bids, and review of documentation provided.
Bids: All bids estimated at $25,000 or more are publicly opened and read at the time, date, and place specified in the bid document.
RFP/RFQ/RFI: Responses to RFP/RFQ/RFI are not publicly opened. Names of respondents will be made available based on the names identified on the sealed package and is, therefore, subject to change.

For bid tabulations before June 2016 see https://datacatalog.cookcountyil.gov/d/pn38-yupm

Tags: award, bid, bid-tab, bid-tabs, contract, procurement, purchase, rfi, rfp
Organization: Cook County of Illinois
Parcel Points

This is a comprehensive point theme that incorporates parcel ownership and address information, parcel valuation information and basic information about the land and structure(s) associated with a given tax assessment account. Data for the Parcel point theme are obtained from the State Department of Assessments and Taxation with added data from Maryland Department of Planning. 

The date the point was most recently published in Planning's data products MdProperty View and FINDER Quantum is contained in the mdpvdate field.  The date of the most recent Assessments data linkage to MdProperty View/FINDER Quantum points is contained in the sdatdate field.  Accounts deleted between those two dates are no longer represented as points.  

For more information on the attribute definitions please see the MdProperty View User's Guide, available for download at https://planning.maryland.gov/Pages/OurProducts/DownloadFiles.aspx . **Please Note: Due to the extensive size of the parcel points file, download is recommended from the REST endpoint (https://geodata.md.gov/imap/rest/services/PlanningCadastre/MD_PropertyData/MapServer/exts/MDiMapDataDownload/customLayers/0)**

Organization: State of Maryland
Maryland Foreclosure Notice Data by County

Provides monthly totals of Notices of Intent (NOI), Notices of Foreclosure (NOF), and Foreclosure Property Registrations (FPR) for Maryland Counties as reported to the Office of Financial Regulation (OFR). 

For additional information and definitions, please see the OFR's Foreclosure Data Tracker: https://www.labor.maryland.gov/finance/consumers/frforeclosuredatatracker.shtml.  

NOTE: The data provided is for informational and research purposes only and is not intended to guide policy or provide specific outreach targets. The data provided is compiled from third-party filings with the Office of Financial Regulation (OFR) pursuant to applicable law. These third-party filings may contain duplicates and other errors and the OFR cannot guarantee the accuracy and quality of the submissions upon which the data is based. The data does not constitute foreclosure case records and may differ from the official foreclosure records contained in the court records of the State of Maryland. OFR makes no express or implied warranties or representations concerning the data contained in this report.

Tags: foreclosure, housing, maryland-mortgage
Organization: State of Maryland
CAMA Core

This is a comprehensive point theme that incorporates Computer Assisted Mass Appraisal (CAMA) core property characteristics, including summary building characteristics for the property, associated with a given parcel account number (ACCTID field). Data for the CAMA Core point theme are obtained from the State Department of Assessments and Taxation for all jurisdictions on a yearly basis. This is a single record per parcel account number point theme. All other CAMA point themes, Building, Building Subareas and Land, can be joined to this point theme. For more information on the attribute definitions please see the MdProperty View User's Guide, available for download at http://planning.maryland.gov/OurProducts/downloadFiles.shtml. CAMA attribute definitions can be found in Appendix D of the User's Guide.

Organization: State of Maryland
Places of Use - Storage/Mining

<p>Points of Diversion (POD): Depicts the location of each water right diversion point (POD) and provides basic information about the associated water right. All current and individually held water rights are shown in this data set except for those held by irrigation districts, applications, temporary transfers, instream leases, and limited licenses.Current code definitions at: https://www.oregon.gov/owrd/WRDFormsPDF/wris_code_key.pdf.Compilation procedures document at: https://arcgis.wrd.state.or.us/data/OWRD_WR_GIS_procedures.pdf. ----- Places of Use (POU): Depicts the location of each water right place of use (POU) polygon and provides basic information about the associated water right. All current and individually held water rights are shown in this data set except for those held by irrigation districts, applications, temporary transfers, instream leases, and limited licenses.Current code definitions at: https://www.oregon.gov/owrd/WRDFormsPDF/wris_code_key.pdf.Compilation procedures document at: https://arcgis.wrd.state.or.us/data/OWRD_WR_GIS_procedures.pdf.</p>

Tags: oregon, places-of-use, points-of-appropriation, points-of-diversion, water-rights
Organization: State of Oregon
Municipal Boundaries - Generalized

State of Maryland municipality boundary dataset.Maryland Department of Planning (MDP) maps annexations from municipalities. This dataset is created and maintained by the Maryland Department of Planning. These boundaries are not intended to serve as a legal description.  Fields:MUN_NAME (Municipality Name): Name of Municipality located in Maryland.RESOLUTION_NUMBER (Resolution Number): Local Municipality Annexation Resolution Number.ANNEXATION_DATE (Annexation Date) (DD/MM/YYYY): The Annexation Date field shows when there's been a change in the boundary. This date is known as the “Effective Date” from the municipality. The date 1/1/1997 is used as a default date of when annexation changes were first indicated in the GIS layer and not necessarily of when it was actually annexed. If there's a date of 1/1/1997, it can be assumed that the annexation occurred on this date or before. For example, for Baltimore City, the city boundary was determined hundreds of years ago. Other than that default date, the date will show when the property was annexed.  MUN_CODE (Municipality Code): MUN = within Priority Funding Area (PFA); MUNCOM = PFA with comment; MUN_NONPFA = not in PFAACRES (GIS Acres): GIS calculated acresJURSCODE (Jurisdiction Code) – Four letter county code: ALLE (Allegany), ANNE (Anne Arundel), BACI (Baltimore City), BACO (Baltimore County), CALV (Calvert), CARO (Caroline), CARR (Carroll), CECI (Cecil), CHAR (Charles), DORC (Dorchester), FRED (Frederick), GARR (Garrett), HARF (Harford), HOWA (Howard), KENT (Kent), MONT (Montgomery), PRIN (Prince George’s) QUEE (Queen Anne’s), SOME (Somerset), STMA (St. Mary’s), TALB (Talbot), WASH (Washington), WICO (Wicomico), WORC (Worcester).

Organization: State of Maryland
Maryland SSURGO Soils

Soil surveys can be used for general farm, local, and wider area planning. Onsite investigation is needed in some cases, such as soil quality assessments and FOR certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center at the following link: https://offices.sc.egov.usda.gov/locator/app?agency=nrcs (USDA Service Center) or your NRCS State Soil Scientist at the following link: https://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/?cid=nrcs142p2_053951 (NRCS State Soil Scientist). COPYWRITE TEXT: Soil Survey Staff, Natural Resources Conservation Service, United States Department of Agriculture. Web Soil Survey. Available online at the following link: https://websoilsurvey.sc.egov.usda.gov/. Accessed [10/1/2018].

Organization: State of Maryland
Priority Preservation Areas

This GIS dataset contains Priority Preservation Areas (PPAs) adopted by counties under the Agricultural Stewardship Act of 2006. Data are collected from counties by the Maryland Department of Planning (MDP) or digitized by MDP in coordination with local jurisdictions. For more information about the Agricultural Stewardship Act of 2006, see the PPA requirement established in House Bill 2 (2006) for counties seeking state certification of their farmland preservation programs and located in §2-518 of the Agriculture Article. Certification allows a county to retain more locally generated agricultural land transfer tax for land preservation. Not all counties have PPAs.This document describes standard operating procedures for aggregating PPA GIS data. These procedures may not apply to historical data (i.e. records for which the GIS_SRC field is blank). For example, MDP may have realigned historical data from local jurisdictions to parcel polygon boundaries.MDP generally requests updated GIS data after learning of a change to a PPA. Aggregated data may be outdated or incomplete if MDP has not yet received or processed GIS updates from jurisdictions. MDP generally does not alter geometries received from the local jurisdictions.This dataset is a public resource for general information purposes. Only the PPA, as depicted in the County's Comprehensive Plan, is the official PPA.  The Maryland Department of Planning cannot guarantee the accuracy of the information contained in this resource. Each user is responsible for determining its suitability for his or her intended use or purpose.  The Maryland Department of Planning or the State of Maryland has no liability from any damages or interpretations caused by this resource.  Any errors or omissions should be reported to Tina James, christina.james@maryland.gov.Last Updated: 2/17/2026

Organization: State of Maryland