Cook County GIS Department map of municipal boundaries in Cook Cook County, Illinois in PDF format. Includes major streets, waterbodies, rail, Cook County Forest Preserve, and municipal boundaries.

Forest Preserve District of Cook County boundaries. To view or use these shapefiles, compression software and special GIS software, such as ESRI ArcGIS, is required.

Polygon vector map data covering city boundaries for Chicago, Illinois, containing 1 feature.

Boundary GIS (Geographic Information System) data is spatial information that delineates the geographic boundaries of specific geographic features..

This data typically includes polygons representing the outlines of these features, along with attributes such as names, codes, and other relevant information.

Boundary GIS data is used for a variety of purposes across multiple industries, including urban planning, environmental management, public health, transportation, and business analysis.

Available for viewing and sharing as a map in a Koordinates map viewer. This data is also available for export to DWG for CAD, PDF, KML, CSV, and GIS data formats, including Shapefile, MapInfo, and Geodatabase.

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Suburban Cook County Election Precincts maintained by the Cook County Clerk's Election Department. Not included are the City of Chicago Election Precincts which are maintained by the Chicago Board Of Elections. An ArcGIS Service is available at: https://hub-cookcountyil.opendata.arcgis.com/datasets/0e91b48d49744346be343f0cb99d25bd_0/

Voting District Project of the Census Redistricting Data Program commenced in Summer of 2017 to establish the state’s Voting precincts within the bureau’s tiger geography. The initial phase used the Bureau’s GUPS plugin for QGIS to update the districts from the 2010 round, and then a secondary verification phase took place to ensure the updated voting districts were properly enacted into Tiger geographic files. A post census effort took place in December 2021 to cut the number of precincts down countywide to 1430. Election Data Services conducted Phase 2 of the Census Redistricting Data Program for the State of Illinois, as well as implemented changes made post census in Cook County.

Precincts are updated as needed before every election by the Cook County Clerk's Elections Department.

Neighborhood polygons used by the Cook County Assessor's Office for valuation and reporting. These neighborhoods are specific to the Assessor. They are intended to represent homogenous housing submarkets, NOT Chicago community areas or municipalities. These neighborhoods were reconstructed from individual parcels using spatial buffering and simplification. The full transformation script can be found on the Assessor's GitHub. Read about the Assessor's 2025 Open Data Refresh.

Cook County GIS Dept map of Worth & Lake Townships in a pdf format. Includes streets and municipalities.

Cook County GIS Department map of Cook County Commissioner District 14 in PDF format. Includes major streets, waterbodies, rail, and Cook County Commissioner District boundaries.

Cook County GIS Dept map of Barrington Township in a pdf format. Includes streets and municipalities.

Cook County GIS Dept map of Thornton Township in a pdf format. Includes streets and municipalities.

Cook County GIS Department map of Cook County Commissioner Districts in PDF format. Includes major streets, waterbodies, rail, and Cook County Commissioner District boundaries.

Cook County GIS Dept map of Maine & Jefferson Townships in a pdf format. Includes streets and municipalities.

The purpose of this dataset is to indicate the boundary of each Commissioner district in Cook County, Illinois. These boundaries are based off of Census 2010 geographies, were adopted June 2012 and went into effect in December 2014 following the County Commissioner elections.

Cook County GIS Dept map of Stickney and Lake Townships in a pdf format. Includes streets and municipalities.

Cook County GIS Department map of Cook County Commissioner District 16 in PDF format. Includes major streets, waterbodies, rail, and Cook County Commissioner District boundaries.

Historical data. For current boundaries see https://datacatalog.cookcountyil.gov/id/vx2u-6dxj. The purpose of this dataset is to indicate the boundary of each Commissioner district in Cook County, Illinois. These boundaries are based off of Census 2000 geographies and were in effect until the December 2014 County Commissioner elections.

Cook County GIS Dept map of Berwyn, Cicero, Oak Park & Stickney Townships. West and South Towns in a pdf format. Includes streets and municipalities.

Cook County GIS Department map of Cook County Commissioner District 7 in PDF format. Includes major streets, waterbodies, rail, and Cook County Commissioner District boundaries.

The following dataset includes "Active Benchmarks," which are provided to facilitate the identification of City-managed standard benchmarks. Standard benchmarks are for public and private use in establishing a point in space. Note: The benchmarks are referenced to the Chicago City Datum = 0.00, (CCD = 579.88 feet above mean tide New York). The City of Chicago Department of Water Management’s (DWM) Topographic Benchmark is the source of the benchmark information contained in this online database. The information contained in the index card system was compiled by scanning the original cards, then transcribing some of this information to prepare a table and map. Over time, the DWM will contract services to field verify the data and update the index card system and this online database.This dataset was last updated September 2011. Coordinates are estimated. To view map, go to https://data.cityofchicago.org/Buildings/Elevation-Benchmarks-Map/kmt9-pg57 or for PDF map, go to http://cityofchicago.org/content/dam/city/depts/water/supp_info/Benchmarks/BMMap.pdf. Please read the Terms of Use: http://www.cityofchicago.org/city/en/narr/foia/data_disclaimer.html.

Cook County GIS Department map of Cook County Commissioner District 4 in PDF format. Includes major streets, waterbodies, rail, and Cook County Commissioner District boundaries.

Cook County GIS Department map of Cook County Commissioner District 12 in PDF format. Includes major streets, waterbodies, rail, and Cook County Commissioner District boundaries.