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

Illinois Boundary-Based LayersThis dataset contains boundary and administrative layers for the state of Illinois, supporting regional planning, infrastructure development, and government decision-making. The dataset includes various geographic divisions, such as counties, municipalities, and economic regions.Layers Included:Counties – Official county boundaries in Illinois.Municipal Boundaries – City, town, and village limits within the state.Economic Development Regions – Defined regions for economic planning and policy initiatives.Legislative & Administrative Districts – Political and governance boundaries used for state and local representation.This feature dataset provides essential boundary and administrative layers for the state of Illinois, supporting regional planning, infrastructure development, broadband expansion, and government decision-making. The dataset includes official jurisdictional and economic boundaries, ensuring accurate spatial data for state agencies, municipalities, and economic planners. These layers are used for broadband infrastructure mapping, public policy implementation, zoning regulations, and funding allocation, making them a critical resource for data-driven decision-making across various sectors. Layers Included:

Census Blocks (2010) – Used for demographic analysis and broadband eligibility mapping. Congressional Districts (2020 Redistricting) – Updated federal legislative boundaries for policy analysis and representation. County Boundaries – Official county jurisdictional limits used for statewide and local planning. Electric Utility Boundaries – Defines service areas of electric providers for infrastructure coordination. Federal Lands – Identifies federally owned properties, including national parks, military bases, and protected lands. Opportunity Zones (Tracts) – Displays designated economic development zones to encourage investment and business growth. School Districts (E-Rate) – Represents school district boundaries to support education funding and broadband initiatives. State House Districts (2020 Redistricting) – Updated Illinois State House legislative boundaries. State Senate Districts (2020 Redistricting) – Updated Illinois State Senate legislative boundaries. Village Boundaries – Defines city, town, and village limits across Illinois. Townships/Precincts, Cities, and Villages – Displays townships and voting precincts; users can zoom in for detailed city and village boundaries.

Usage & Integration:

Supports State & Local Planning – Provides official jurisdictional boundaries for zoning, economic development, and public infrastructure projects. Broadband Expansion & Utility Coordination – Used for mapping broadband availability and planning utility infrastructure. Legislative & Policy Applications – Assists in election planning, representation, and legislative resource allocation. Public & Private Sector Use – Utilized by government agencies, municipalities, businesses, and researchers for geospatial analysis.

Change Log:

3/14/2025 - Updated item details with significant elaboration on what is included in this service. 1/30/2025 – Updated county and municipal boundaries to reflect recent administrative changes. 1/15/2025 – Added electric utility boundaries to support broadband and infrastructure coordination. 12/20/2024 – Refined opportunity zones and federal lands data for economic planning purposes. 11/10/2024 – Adjusted state and congressional district boundaries to match official redistricting updates. 10/05/2024 – Initial dataset release with core administrative and planning layers.

Access & Contact:

Dataset Access: Available in ArcGIS Online

This Illinois Boundary-Based Layers dataset provides a comprehensive and authoritative resource for regional planning, broadband expansion, utility coordination, and legislative mapping across the state.

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.

Includes: IDOT, NAIP, NAPP data and IL geography shapefiles ISGS data from Don

Illinois is at the center of the nation’s rail network. It has a comprehensive rail network consisting of approximately 9,982 miles of railroad tracks, 7,792 of which are operated by Class I railroads – primarily BNSF Railway and the Union Pacific Railroad (UP). Class I railroads are large freight companies, Class II and Class III are small regional railroad companies. The remaining 2,190 miles of track are operated by Class III short line or regional railroads. A total of 41 railroads currently operate in Illinois. They range in size from a short one-mile interstate carrier to larger railroads extending from Illinois to the West and East Coasts, Gulf of Mexico, Canada, and Mexico. Seven are freight (Class I) carriers and 34 are regional, local, switching and terminal railroads. In all, 40 railroads are able to provide service from Illinois to every part of the United States. Chicago is the largest US rail gateway and there is another major rail center located in East St. Louis. Rail’s importance to both Chicago and the state is highlighted by the fact that over 1,300 freight, passenger and commuter trains pass through the Chicago region every day and, in 2011, Illinois ranked first in the nation in terms of rail freight volume at 490.4 million tons.Updated from IDOT Illinois Railroads MapBase source 9/19/2019

Hyperspectral data of IL. Visit https://dataone.org/datasets/sha256%3A764320d6b18239943c99b602c5905e985f6acf580247ed980841f82efa3a0a62 for complete metadata about this dataset.

Hyperspectral data of IL. Visit https://dataone.org/datasets/sha256%3Af81840f54d32ec04f58a0292bcd245fafc0edc352caa54e22d86cdbb975a219f for complete metadata about this dataset.

Illinois Protected Lands (Prairie State Conservation Coalition). This dataset is a proxy to the I-View dataset maintained by David Holman (Prairie State Conservation Coalition), and can also be accessed on I-View (see link below). Source:https://pscc.maps.arcgis.com/apps/webappviewer/index.html?id=fb8dbaacc7b04c7fa12e850b9e7141ab

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

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.

Land cover in the USand the CCW - The land cover data is collected annually from USDA for the whole US. The data can be downloaded here https://nassgeodata.gmu.edu/CropScape/. Data resolution is 30 *30 m. The available data period for both USRB and CCW is from 2008 till 2015

Cook County GIS Dept map of Northfield and New Trier Townships in a pdf format. Includes streets and municipalities.

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.

This resource is a member of a series. The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) System (MTS). The MTS represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. County subdivisions are the primary divisions of counties and equivalent entities for the reporting of Census Bureau data. They include legally-recognized minor civil divisions (MCDs) and statistical census county divisions (CCDs), and unorganized territories. In MCD states where no MCD exists or is not defined, the Census Bureau creates statistical unorganized territories to complete coverage. The entire area of the United States, Puerto Rico, and the Island Areas are covered by county subdivisions. The boundaries of most legal MCDs are as of January 1, 2025, as reported through the Census Bureau's Boundary and Annexation Survey (BAS). The boundaries of all CCDs are those as reported as part of the Census Bureau's Participant Statistical Areas Program (PSAP) for the 2020 Census.

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

This is a hosted feature layer of Illinois County boundaries.NOTE: Sync is enabled for D7 use

Cook County GIS Dept map of West, South and North Towns in a pdf format. Includes streets and municipalities.

Download In State Plane Projection Here. This is our working version of the Lake County boundary. Although technically the county's eastern border extends eastward into Lake Michigan to the state line where Illinois meets Michigan, we routinely use the Lake Michigan shoreline as our eastern boundary for mapping purposes. The north, west and south boundaries are based on a compilation of survey data which aligns well, but not perfectly, with the border as mapped by neighboring counties and the State of Wisconsin, which forms the northern boundary of the county. Update Frequency: This dataset is updated on a weekly basis.

The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. The TIGER/Line shapefiles include both incorporated places (legal entities) and census designated places or CDPs (statistical entities). An incorporated place is established to provide governmental functions for a concentration of people as opposed to a minor civil division (MCD), which generally is created to provide services or administer an area without regard, necessarily, to population. Places always nest within a state, but may extend across county and county subdivision boundaries. An incorporated place usually is a city, town, village, or borough, but can have other legal descriptions. CDPs are delineated for the decennial census as the statistical counterparts of incorporated places. CDPs are delineated to provide data for settled concentrations of population that are identifiable by name, but are not legally incorporated under the laws of the state in which they are located. The boundaries for CDPs often are defined in partnership with state, local, and/or tribal officials and usually coincide with visible features or the boundary of an adjacent incorporated place or another legal entity. CDP boundaries often change from one decennial census to the next with changes in the settlement pattern and development; a CDP with the same name as in an earlier census does not necessarily have the same boundary. The only population/housing size requirement for CDPs is that they must contain some housing and population. The boundaries of most incorporated places in this shapefile are as of January 1, 2017, as reported through the Census Bureau's Boundary and Annexation Survey (BAS). The boundaries of all CDPs were delineated as part of the Census Bureau's Participant Statistical Areas Program (PSAP) for the 2010 Census.