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.

Carroll Shaded Relief 1997 Carroll County Shaded Relief
Carroll Surface Slopes 1997 Carroll County Surface Slopes
Carroll Surface Topography 1997 Carroll county Surface Topography
Cook Geologic Atlas 2004 Cook county Geologic Atlas
Henry Surficial Geology 2011 Henry County Surficial Map
Henry Surface Topography 2012 Henry County Surface Topography
Jo Daviess Aquifer Sensitivity 2000
Jo Daviess Bedrock Geology 2000 Jo Daviess Bedrock Map
Jo Daviess Bedrock Topography 2000 Jo Daviess Bedrock Map
Jo Daviess Data Points 2000 Jo Daviess Data Points

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

*excludes EDMAP Series