Illinois / IL-04
Illinois District 4
Score
Irregularity score 86 Very irregularLess compact than 90% of other congressional districts.
45th least compact of 429 nationally, 11th of 17 in Illinois.
A score describes shape, not intent. Coastlines, rivers and the Voting Rights Act can all make a district irregular. How scores work
The three measures
- Polsby-Popper
- 0.12at least as compact as 13% of districts on this measure
Area compared with perimeter. Low for jagged or snaking edges.
- Reock
- 0.39at least as compact as 24% of districts on this measure
Area compared with the smallest circle around the district, counting only land. Low for stretched shapes.
- Convex hull
- 0.56at least as compact as 6% of districts on this measure
Area compared with a rubber band stretched around the district, counting only land. Low for bites and tentacles.
Each measure runs from 0 to 1, where 1 is a perfect circle or a shape with no dents.
Who lives here
Most of this district's voting-age residents are Hispanic or Latino (63.2%). The Voting Rights Act can require districts that keep a minority community together so it can elect candidates it prefers, and those districts can be irregular on purpose. A district like this isn't necessarily drawn for that reason, and the site doesn't know whether this one was. Figures are from the 2020 Census. How these are counted
Cities and towns
The largest places with people in this district, from the 2020 Census. A place split between districts shows how many of its residents live in this one.
- Chicago city370,866 of its 2,746,388 residents
- Cicero townall 85,268 residents
- Berwyn cityall 57,250 residents
- Burbank cityall 29,439 residents
- Melrose Park villageall 24,796 residents
- Brookfield village19,475 of its 19,476 residents
- Hinsdale village17,303 of its 17,395 residents
- Elmhurst city14,360 of its 45,786 residents
- Franklin Park village13,436 of its 18,467 residents
- Northlake cityall 12,840 residents
And 19 smaller places. 2% of this district's people live outside any city, town or named community. How places are counted
ZIP codes
33 ZIP codes have residents in this district. 26 of them are split with other districts. A percentage is the share of that ZIP code's 2020 residents who live here.
- 60126 (32%)
- 60131 (72%)
- 60153 (8%)
- 60160 (99%)
- 60163 (58%)
- 60164
- 60165
- 60171 (37%)
- 60181 (1%)
- 60304 (1%)
- 60402
- 60453 (7%)
- 60455 (2%)
- 60459
- 60501 (95%)
- 60513 (99%)
- 60514 (29%)
- 60521 (99%)
- 60523 (40%)
- 60525 (39%)
- 60526 (85%)
- 60527 (1%)
- 60534
- 60546 (89%)
- 60608 (86%)
- 60609 (52%)
- 60616 (1%)
- 60623 (67%)
- 60629 (72%)
- 60632
- 60638 (44%)
- 60652 (37%)
- 60804
These are the Census Bureau's ZIP code areas, which match residential ZIP codes closely. ZIP codes used only for PO boxes or a single organization aren't included. How ZIP codes are matched
2024 presidential vote
Shares of the votes for the two of them; other candidates are left out. Illinois used the same lines in 2024, so this is added up from precinct results. A precinct split between districts is divided by its House votes, so the figures are close estimates. Where the votes come from
U.S. House
Statewide results from Illinois for the November 3, 2026 election aren't available yet.
Illinois's senators
- Tammy Duckworth, Democrat
- Richard J. Durbin, DemocratSeat on the November 3, 2026 ballot: results aren't available yet.
Senators are elected by the whole state, so district lines don't change who they are. Senators serving as of November 6, 2026. Senators elected in November 2026 take office January 3, 2027. Where this comes from
Where it sits in Illinois
- Very compact (0 to 19)
- Compact (20 to 39)
- Middle (40 to 59)
- Irregular (60 to 79)
- Very irregular (80 to 100)
The area outlined with dashes on the map, enlarged so its smaller districts can be seen.
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