Illinois county maps
121 county maps across 15 counties in Illinois. Available layers: Parcels, FEMA Flood Zones, Wetlands, Soils, Contour Lines, Transmission Lines, Substations, Power Plants and Superfund Sites. Choose a county and a layer to open its map.
Counties in Illinois
- Champaign County
- Cook County
- DuPage County
- Kane County
- Kendall County
- Lake County
- Madison County
- McHenry County
- McLean County
- Peoria County
- Rock Island County
- Sangamon County
- St. Clair County
- Will County
- Winnebago County