This Data Set contains a GIS/Map of Elected Officials in Cook County

This is a Cook County Feature class of Unincorporated Zoning District Boundaries (Aggregate). This data is provided by the Cook County Dept. Of Building and Zoning and is maintained by the Cook County Zoning Board of Appeals.
Only unincorporated district boundaries are available, please contact specific municipalities for questions regarding incorporated municipal zoning districts.

Neighborhoods play an important role in residential property assessment. Single-family and residential multi-family property assessments are sensitive to neighborhood boundaries. Neighborhoods are nearly always used in statistical regression models to produce initial assessed values, and comparable properties are nearly always selected from within neighborhoods for the purposes of appeal. See data notes for additional information.

This dataset shows what agencies are in a tax code for each tax year along with the agency and tax code rates. Data is updated yearly. For more information on Tax codes and Tax agencies visit the Cook County Clerk's website at: http://www.cookcountyclerk.com/tsd/Pages/default.aspx

The Lakes and Rivers hydrographic polygon data layer was created to accurately depict the location and shape of flowing water features greater than five feet in width and major standing water bodies in Cook County.

Annual Tax Sale: A yearly auction of delinquent taxes where a tax buyer (purchaser) pays the delinquent taxes due on a parcel. This results in a lien on the property. The property owner must repay the tax buyer with interest for the amount of the sale – this is known as “redemption.” If redemption does not occur within a set time period, the tax buyer can obtain legal title to the property – this is referred to as a “tax deed.”

The feature class Right-of-Way indicates tax exempt rights-of-way digitized from recorded plats.

This dataset is updated nightly. For extended information about Lobbyist Activities in Cook County IL, visit the Cook County Clerk's Lobbyist search: http://lobbyist.cookcountyclerk.com/Public/SearchHome.aspx

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 policy, the Board also maintains as confidential the identity of the requestors of advisory opinions. Board of Ethics Rules & Regulations, § 4.10. The Board, however, is undertaking to make its final determinations available to the public with such deletions as may be necessary to prevent disclosure of any information the Board determines to be confidential.