County Maps

Map of Illinois showing counties that have been mapped.

County mapping is carried out at the ISGS under a variety of programs. The programs exist for different purposes and require different levels of scientific review. Maps are published in specific Series based on the program under which they were created and the corresponding level of review. The links on this page access all downloadable county-scale maps except Coal, Oil, and Gas, which are maintained separately. Please use the Coal Maps and Oil and Gas Maps links to access those maps.

The ISGS Library page provides links to catalogs of ISGS maps and publications.

Kane 2007 Kane County Aquifer Map
Lake Three-dimensional Model 2003 Lake County 3D
Lake Surface Topography 2013 Lake Surface Topography
Lake Surficial Geology 2012
Lee Outwash Sand Deposits 2009 Lee County Deposits Map
Lee Bedrock Geology 1999 Lee County Bedrock Map
Lee Bedrock Topography 1999 Lee County Bedrock Map
Lee Data Points 1999 Lee County Data Points
Lee Quaternary Deposits 1999 Lee County surficial map
Lee Shaded Relief 1999 Lee County Shaded Relief


Purchase this map online through Shop ISGS*, or contact the Sales and Information Office for more information.

*excludes EDMAP Series