Created for all users to view and understand jurisdictional boundaries within Cook County. GIS department maintains Municipality feature. State of Illinois maintains Board of Review, Congressional District, Judicial District, State Representative and State Senate. Service published in 2019. Data is updated as provided
While efforts have been made to be as accurate as possible, Cook County provides the data for personal use “as is”. The data is not guaranteed to be accurate, correct, or complete. Information provided should not be used as a substitute for legal, business, tax, or other professional advice. The recipient/viewer should contact appropriate regulating agencies to determine accuracy or suitability of the data for a particular use. Cook County or its staff assume no liability whatsoever for any losses that might occur from the use, misuse, or inability to use its geospatial data, maps or websites. All materials appearing on a map, geospatial data or County GIS web sites are transmitted without warranty of any kind and are subject to the terms on this disclaimer.