Mapping Congress


Welcome to Mapping Congress, a digital history collaboration examining American political history. Mapping Congress makes available GIS shapefiles and Congressional data allowing historians to examine the importance of space and geography in political history, as well as resources for the classroom.


Download raw data files on Congressional elections, Roll Calls, and demographics. Or get geographic shapefiles and create your own maps.

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For those interested in learning to use ArcGIS, videos take you step by step through using Mapping Congress data or how to create your own geographic data.

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Teaching Resources

Election maps for Congressional elections are available for using in classes and talks.

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