County Maps
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 | 2000 | Bedrock Geology |
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| Boone | 2000 | Bedrock Topography |
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| Bureau | 2009 | Surficial Geology |
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| Carroll | 1997 | Aquifer Sensitivity |
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| Carroll | 1997 | Bedrock Topography |
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| Carroll | 1997 | Bedrock Geology |
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| Carroll | 1997 | Land Cover |
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| Carroll | 1997 | Mineral Resources |
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| Carroll | 1997 | Shaded Relief |
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| Carroll | 1997 | Surface Slopes |
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| Carroll | 1997 | Surface Topography |
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| Henry | 2012 | Surface Topography |
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| Henry | 2011 | Surficial Geology |
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| Kane | 2007 | Three-dimensional Model |
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| Kane | 2007 | Aquifer Sensitivity |
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| Kane | 2007 | Bedrock Geology |
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| Kane | 2007 | Cross Sections |
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| Kane | 2007 |
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| Lake | 2013 | Surface Topography |
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| Lake | 2015 | Surficial Geology |
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| Lee | 1999 | Bedrock Geology |
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| Lee | 1999 | Bedrock Topography |
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| Lee | 1999 | Data Points |
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| Lee | 1999 | Quaternary Deposits |
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| Lee | 1999 | Shaded Relief |
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| Lee | 1999 | Surface Topography |
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| Monroe | 2012 | Sinkhole Distribution |
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| Carroll | 1997 | Data Points |
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| Carroll | 1997 | Surficial GeologyQuaternary Deposits |
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| Cook | 2004 | Geologic Atlas |
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| Jo Daviess | 2000 | Aquifer Sensitivity |
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| Jo Daviess | 2000 | Bedrock Geology |
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| Jo Daviess | 2000 | Bedrock Topography |
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| Jo Daviess | 2000 | Data Points |
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| Jo Daviess | 2000 | Quaternary Deposits |
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| Jo Daviess | 2000 | Land Cover |
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| Jo Daviess | 2000 | Surface Topography |
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| Jo Daviess | 2000 | Surficial Geology |
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| Jo Daviess | 2000 | Shaded Relief |
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| Madison | 2006; originally 2006 | Surficial Geology |
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| McHenry | 1995 | Bedrock Topography |
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| McLean | 1997 | Bedrock Topography |
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| McLean | 1997 | Data Points |
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| McLean | 1997 | Extraction Operations |
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| McLean | 1997 | Surface Topography |
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| McLean | 1997 | Drift ThicknessQuaternary Deposits |
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| McLean | 1998 | Cumulative Sand and Gravel Thickness |
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| Tazewell | 2003 | Aquifer Sensitivity |
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| Tazewell | 2003 | Bedrock Topography |
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| Tazewell | 2003 | Data Points |
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| Tazewell | 2003 | Drift ThicknessQuaternary Deposits |
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| Tazewell | 2003 | Shaded Relief |
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| Tazewell | 2003 | Surface Slopes |
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| Tazewell | 2003 | Surface Topography |
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| Tazewell | 2003 | Surficial Geology |
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| Tazewell | 2003 | Extraction Operations |
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| Lake | 2003 | Three-dimensional Model |
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| Kane | 2013 | Surficial Geology |
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| Whiteside | 2013 | Surficial Geology |
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| St Clair | 2011; originally 2010 | Surficial Geology |
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| Lee | 2009 | Outwash Sand Deposits |
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| Hardin | 2014 | Bedrock Geology |
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| Champaign | 2014 | Surface Topography |
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| DuPage | 2014 | Surface Topography |
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| Jo Daviess | 2014 | Surface Topography |
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| Kane | 2014 | Surface Topography |
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| Lee | 2014 | Surface Topography |
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| McHenry | 2014 | Surface Topography |
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| Monroe | 2014 | Surface Topography |
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| St Clair | 2014 | Surface Topography |
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| Whiteside | 2014 | Surface Topography |
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| Will | 2014 | Surface Topography |
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| Jo Daviess | 2015 | Karst Terrain |
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| Pope | 2016 | Bedrock Geology |
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| Jo Daviess | 2017 | Karst Terrain |
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| Williamson | 2020 | Bedrock Geology |
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| Williamson | 2020 | Surficial Geology |
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