Explore the Illinois County Map and view all 102 counties at a glance. Find county names, boundaries, major cities, county seats, population data, and detailed geographic information for Illinois.Type your paragraph here
All illinois Counties: Names, Map & County Information
Explore all 102 counties in Illinois with a detailed county list, map, county seats, and key information. Find every Illinois county in one place here.
Illinois County Map: Overview
The Illinois County Map provides a detailed view of the state’s county boundaries and geographic organization. Illinois is divided into 102 counties, which serve as important geographic and administrative units for presenting demographic, geographic, and other county-level information.
The official Illinois county map also identifies county seats.GIS-based county maps can provide additional geographic information, including county boundaries and FIPS identifiers. Illinois state GIS services maintain digital county boundary layers that can be used for mapping and geographic analysis.
Illinois County Map at a Glance
| Feature | Details |
|---|---|
State |
Illinois County |
Number of Counties |
102 |
County Map |
Shows all 102 county boundaries |
County Seats |
Shown on the official state map |
GIS Data |
Digital county boundary layers are available |
Common Uses |
Mapping, GIS, research, education, planning, geographic analysis |
Interesting Facts About Illinois County Map
- Illinois has 102 counties.
- Cook County is home to Chicago and is the most populous Illinois county.
- McLean County is the largest Illinois county by land area, while Putnam County is the smallest by land area.
- Counties are important geographic units for presenting demographic and other county-level data in Illinois.
- Digital GIS datasets can represent Illinois county boundaries as polygon features and include county names and FIPS information.
FAQ
Illinois has 102 counties.
An Illinois County Map shows the boundaries and names of the state’s counties. The official state map also shows county seats.
An Illinois County GIS Map is a digital geographic map that represents county boundaries as GIS data. Such datasets can include county names and FIPS identifiers.
The Illinois Secretary of State’s Illinois Blue Book provides an official map showing Illinois counties and county seats.
County maps are commonly useful for geographic research, GIS projects, education, land and regional analysis, planning, and displaying county-level information.
Conclusion
The Illinois County Map is a useful reference for understanding the state's 102 counties and their geographic boundaries. Whether you are researching Illinois geography, working on a GIS project, studying county-level information, or creating educational map content, a county map provides a clear overview of the state's administrative geography. Official Illinois GIS resources also provide digital county boundary data for more detailed geographic applications.