This is a hosted feature layer of Illinois County boundaries.

Lake County's most comprehensive interactive web mapping application and GIS data viewer. View data, run analysis tools, and create PDF documents all inside Maps Online!

Vector polygon map data of property parcel line from Rockford, Illinois containing 126,327 features.

Property parcel GIS map data consists of detailed information about individual land parcels, including their boundaries, ownership details, and geographic coordinates.

Property parcel data can be used to analyze and visualize land-related information for purposes such as real estate assessment, urban planning, or environmental management.

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.

Download In State Plane Projection Here ** In addition to the Tax Parcel polygons feature class, the hyperlink download above also contains a parcel point data layer ** Parcel boundaries are developed from deeds, plats of subdivision and other legal documents going back to the mid 1800's, following generally accepted practices used in Public Land Survey System states, and following guidelines established by the Illinois Department of Revenue and the International Association of Assessment Officials. Lake County's parcel coverage is based on resolving the accumulated evidence of all of the legal documents surrounding a particular parcel or subdivision, and not the result of a countywide resurvey. These parcel boundaries are intended to be a visual inventory of property for tax and other administrative purposes; they are not intended to be used in place of an on-site survey or for the precise determination of property corners or PLSS features based on GIS coordinates. In Illinois, only a registered professional land surveyor is authorized to determine boundary locations. Included are the tax parcel boundaries, represented as polygons and centroids, for all changes resulting from legal records submitted to the Recorder of Deeds up to December 31st of the preceding year, as well as any court orders, municipal annexations and other transactions which impact the tax parcel boundaries. NOTE: The ONLY attribute included is the Property Index Number, or PARCEL_NUM. Additional assessment attribute data can be downloaded here This parcel layer is used for tax assessment purposes and for a variety of other local government functions. It changes often, both spatially and in its attribution, based on divisions or consolidations, the sale of property and other transactions. Example: PIN 08-17-304-014 can be interpreted as follows: Township 08, Section 17, Block 304, Parcel 014. Note that the first digit of block, "3" in this example, signifies that the parcel lies in quarter section 3. The quarter sections are labeled from 1 through 4, representing the northwest, northeast, southwest and southeast quarter sections, respectively. Update Frequency: This dataset is updated on a weekly basis.

Access Illinois's 164 data folders with 1,435 services and 4,378 layers of parcel boundaries, property tax records, and GIS mapping data.

This geodatabase serves two purposes: 1) to provide State of Illinois agencies with a fast resource for the preparation of maps and figures that require the use of shape or line files from federal agencies, the State of Illinois, or the City of Chicago, and 2) as a start for social scientists interested in exploring how geographic information systems (whether this is data visualization or geographically weighted regression) can bring new meaning to the interpretation of their data. All layer files included are relevant to the State of Illinois. Sources for this geodatabase include the U.S. Census Bureau, U.S. Geological Survey, City of Chicago, Chicago Public Schools, Chicago Transit Authority, Regional Transportation Authority, and Bureau of Transportation Statistics.

This dataset is a derivative of the Federal Township Plats for Lake County, Illinois, the originals of which were captured on a high-resolution scanner by the Illinois State Archives. The Lake County GIS/Mapping division received permission to acquire and georeference these images using ERDAS Imagine. Since the source material was distorted in an unsystematic way due to the rigors of time and points of reference were abundant, the rubber sheeting model in Imagine with the linear option was chosen to rectify the images. The USGS delineations of the section corners for their 1:24,000 scale 7.5 minute quadrangles were chosen as a base because they are a publicly available resource that exists for the entire state of Illinois should any other counties or organizations wish to make a similar product. This final product consists of a mosaic of the townships in Lake County also created in Imagine using their mosaic tool with each township being cropped to its border in the process.

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.

The Lake County Data Extract provides parcel characteristics and tax information for all properties located in Lake County, Illinois. Casual users can find the standalone Tax Parcel Boundary Data above and Parcel Attribute Data here. The information contained in the extract is "as is", and Lake County does not in any way guarantee the correctness or accuracy of the information contained therein.

Vector polygon map data of property parcels from Kendall County, Illinois containing 226,226 features.

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Property parcel GIS map data consists of detailed information about individual land parcels, including their boundaries, ownership details, and geographic coordinates.

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Property parcel data can be used to analyze and visualize land-related information for purposes such as real estate assessment, urban planning, or environmental management.

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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.

This layer is a component of Illinois Reference Layers.

© Illinois State Geological Survey

Cook County GIS Dept map of Commissioner District 10

Map service containing IL Boundaries - Counties, IDOT Districts, Congressional Districts, House of Representative Districts, Senate Districts, Political Townships, Urban Areas, Metropolitan Planning Organization (MPO), Towns.

This layer is a component of Lake County, Illinois Boundary data layers.

© Lake County, Illinois GIS/Mapping Division

Download In State Plane Projection Here. ** The Street Centerline feature class now follows the NG911/State of Illinois data specifications including a StreetNameAlias table. The download hyperlink above also contains a full network topology for use with the Esri Network Analyst extension ** These street centerlines were developed for a myriad of uses including E-911, as a cartographic base, and for use in spatial analysis. This coverage should include all public and selected private roads within Lake County, Illinois. Roads are initially entered using recorded documents and then later adjusted using current aerial photography. This dataset should satisfy National Map Accuracy Standards for a 1:1200 product. These centerlines have been provided to the United States Census Bureau and were used to conflate the TIGER road features for Lake County. The Census Bureau evaluated these centerlines and, based on field survey of 109 intersections, determined that there is a 95% confidence level that the coordinate positions in the centerline dataset fall within 1.9 meters of their true ground position. The fields PRE_DIR, ST_NAME, ST_TYPE and SUF_DIR are formatted according to United States Postal Service standards. Update Frequency: This dataset is updated on a weekly basis.

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

IL Political Townships. This data source is updated by the Illinois Department of Revenue.

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.

Download In State Plane Projection Here. Municipal boundaries are based on annexations, court orders and other legal documents filed in the office of the Recorder of Deeds. Mapping is based on the legal descriptions from those documents, which relate to existing parcel boundaries or to the underlying PLSS. Important attributes include "Type" which contains an "I" if the polygon represents an incorporated area, and a "U" if unincorporated. The municipality name for "I" type polygons is included in the attribute "NAME1." Update Frequency: This dataset is updated on a weekly basis.

These address points were developed for a myriad of uses including general public geocoding in Lake County web sites and NG-911 emergency dispatch. All addresses are reviewed on a monthly basis against the United States Post Office delivery database to ensure that they are still active. New addresses are added at this time or earlier if they are made known to Lake County GIS by local data partners. Attributes DiscrpAgID through Elev reflect the NENA NG-911 / State of Illinois GIS Data model. Additional local data fields have also been included. The fields LSt_PreDir, LSt_Name, LSt_Type and LSt_PosDir are formatted according to United States Postal Service standards.