Nominate.AI/United States/ Illinois/Districts
IL

Illinois districts

Every published boundary for Illinois, on the map in force — 17 congressional districts, 59 state senate districts, 118 state house districts, 102 counties. Projected at build time; no mapping library, no tiles, no runtime requests.

296 polygons 4 layers

Federal

17 congressional districts

Illinois · 17 congressional districts Read 2026-08-15
Illinois: 17 congressional districts. Each district is selectable; the ledger carries the same data as text.
Locator map of the United States with Illinois highlighted.
IL · Illinois
Select a district
District PopulationMedian income
IL-01 751,575$67,268
IL-02 720,502$61,221
IL-03 720,148$83,552
IL-04 704,764$75,442
IL-05 754,102$107,501
IL-06 725,829$92,820
IL-07 732,352$81,352
IL-08 730,604$94,702
IL-09 742,949$90,087
IL-10 746,076$105,666
IL-11 761,048$105,915
IL-12 749,426$65,076
IL-13 725,183$59,299
IL-14 755,370$91,558
IL-15 745,893$70,766
IL-16 755,171$80,425
IL-17 728,697$57,307
cbdistricts GET /api/v1/layers/federal-congressional/geojson · read 2026-08-15 Upstream source: Census TIGER/Line 2024 — https://www2.census.gov/geo/tiger/TIGER2024/CD/ Not shown: Representative(0 of 17), Party(0 of 17), Cook PVI(0 of 17). Returned for too few districts to tabulate — reported as a gap rather than a column of dashes. Geometry simplified to 0.00274° (~400 m) for display. Boundaries are illustrative at this resolution — not a legal description.

Every layer

4 partitions, one point.

Click anywhere on the map, or focus it and use the arrow keys. Each layer covers the same ground and none of them nests inside another — which is why this reads a point rather than expanding a row.

Illinois · 4 layers Read 2026-08-15

Click the map, or focus it and use the arrow keys.

4 partitions, not a hierarchy. federal-congressional (17) · il-state-senate (59) · il-state-house (118) · us-counties (102). A congressional district contains no whole number of state house districts or counties, which is why this reads a point rather than expanding a row. Geometry simplified to 0.00274° (~400 m). A probe near a boundary is not authoritative — at this resolution the line on screen can sit a few hundred metres from the legal one, and near a border that is the whole answer. For an address, ask cbdistricts.

Provenance

Where each layer came from.

Layer Districts Source layer Tolerance Size Read
Congressional 17 federal-congressional 0.00274° 62 KB 2026-08-15
State Senate 59 il-state-senate 0.00274° 97 KB 2026-08-15
State House 118 il-state-house 0.00274° 141 KB 2026-08-15
County 102 us-counties 0.00274° 67 KB 2026-08-15
No representative and no party, deliberately. The districts service returns a representative for 441 of 441 congressional districts, and the values are scraped prose — the word "district" is the representative of ten of them, and 21 records name a party that contradicts their own party field. Both fields are refused at the point the data is fetched rather than printed under a real heading. Boundaries are sound; this is a geography page, not a who-represents-you page.
This page inlines 367 KB of geometry and loads no mapping library, no tiles and no third-party requests. Boundaries are simplified for display and are not a legal description — near a boundary the map is not authoritative.
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