Geospatial data about Illinois County Boundaries. Export to CAD, GIS, PDF, CSV and access via API.

This is a hosted feature layer of Illinois County 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) 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. County subdivisions are the primary divisions of counties and their 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. For the 2010 Census, the MCDs are the primary governmental and/or administrative divisions of counties in 29 States and Puerto Rico; Tennessee changed from having CCDs for Census 2000 to having MCDs for the 2010 Census. 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, 2023, 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.

Polygon vector map data covering county boundaries for Lake County, 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.

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.

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

© Lake County, Illinois GIS/Mapping Division

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.

County boundaries of Illinois download either polygon or line formats.

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.

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.

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. 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 National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee.

Municipal Boundaries for Places near O'Fallon, Illinois, within St. Clair County, Illinois, USA as an ArcGIS Online View.

A feature service showing the Incorporated Areas of Morgan County, IL

Countywide City and Village Boundaries

The Peoria County, Illinois water centerlines were updated by Leading Edge Geomatics and the Peoria County GIS - IT Services Department. The dataset was screen digitized using 6 inch resolution orthophotography which was captured during the spring of 2019 by Pictometry International Corp. Original data was compiled by Sanborn Mapping Company in 2008.

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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Vector polygon map data of city limits from Rockford, Illinois containing 1 feature.

City limits GIS (Geographic Information System) data provides valuable information about the boundaries of a city, which is crucial for various planning and decision-making processes. Urban planners and government officials use this data to understand the extent of their jurisdiction and to make informed decisions regarding zoning, land use, and infrastructure development within the city limits.

By overlaying city limits GIS data with other layers such as population density, land parcels, and environmental features, planners can analyze spatial patterns and identify areas for growth, conservation, or redevelopment. This data also aids in emergency management by defining the areas of responsibility for different emergency services, helping to streamline response efforts during crises..

This city limits data is 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.

Countywide Township and Municipality Boundaries