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Index/Topics/Partisan Representation

Partisan Representation

The relationship between district maps, financial advantages, and legislative control in shaping partisan representation in Illinois.

Fact-Checks

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Jan 30, 2026
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Where can I download Illinois congressional district shapefiles or PDFs?

The official congressional district boundaries and downloadable shapefiles and printable maps are available from multiple authoritative sources: Illinois state /portal services and the ’s TIGER/Line a...

Jan 8, 2026

What is the current Illinois congressional map established in 2021?

The current Illinois congressional map was enacted by the Democratic-controlled General Assembly and signed into law in late November 2021, establishing 17 U.S. House districts following the 2020 cens...