Great Lakes GIS Data Sharing
About Great Lakes GIS Data Sharing
The Great Lakes Commission is a leader in mapping and data analysis for the Great Lakes and the St. Lawrence River region. Our mapping work and Geographic Information System (GIS) files, called map layers, are available for public use, along with other relevant Great Lakes regional data tools. Visit our links below, or click on the expandable sections under Map Layers below to find GIS files that you can download and web maps for you to explore.
Visit some of our online maps and data tools:
- Great Lakes Investment Tracker
- Blue Accounting Open Data Portal
- HABs Collaborative Research Mapper from the Great Lakes HABs Collaborative
- Great Lakes Water Infrastructure Implementation Tactics from Approaches for Improving Great Lakes Water Infrastructure: A Blueprint
- Agriculture in the Great Lakes Dashboard from Agriculture, Climate and Water Use
Great Lakes GIS Map Layers
Below is a quick list of the GIS layers available for the Great Lakes Basin. Please click on a category to expand and view the associated GIS layers. If you would like more, please search our ArcGIS Online resource page linked here.
Political Boundaries
- Great Lakes States Boundaries
- Canadian Great Lakes Provinces Boundaries
- Congressional Districts for the 119th U.S. Congress (2025-2027)
- Illinois County Boundaries
- Indiana County boundaries
- Michigan County Boundaries
- Minnesota County Boundaries
- New York County Boundaries
- Ohio County Boundaries
- Pennsylvania County Boundaries
- Wisconsin County Boundaries
Geographic Boundaries
Elevation/Bathymetries
Watershed Boundaries
Hydrology
Fishery
Birds
Miscellaneous
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