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.

Boone Bedrock Geology 2000 Boone Winnebago BG
Boone Bedrock Topography 2000 Boone Winnebago BT
Bureau Surficial Geology 2009 Sand Deposits, Bureau County
Carroll Aquifer Sensitivity 1997
Carroll Bedrock Topography 1997 Carroll County Bedrock Map
Carroll Bedrock Geology 1997 Carroll County Bedrock Map
Carroll Land Cover 1997 Carroll County Land Cover
Carroll Mineral Resources 1997 Carroll County Mineral Resources
Carroll Shaded Relief 1997 Carroll County Shaded Relief
Carroll Surface Slopes 1997 Carroll County Surface Slopes


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

*excludes EDMAP Series