Illinois District 3

97 Very irregular

Less compact than 99% of other congressional districts.

4th least compact of 429 nationally, 2nd 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: 0.08at least as compact as 5% of districts on this measure
Area compared with perimeter. Low for jagged or snaking edges.
Reock: 0.19at least as compact as 3% of districts on this measure
Area compared with the smallest circle around the district, counting only land. Low for stretched shapes.
Convex hull: 0.42at least as compact as 1% 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 (57.2%) belong to minority groups. The largest is Hispanic or Latino (43.8%). 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 city450,574 of its 2,746,388 residents
Wheaton city32,616 of its 53,970 residents
Bartlett village27,195 of its 41,105 residents
West Chicago cityall 25,614 residents
Addison village23,049 of its 35,702 residents
Elmwood Park village22,265 of its 24,521 residents
Bensenville villageall 18,813 residents
Elgin city18,567 of its 114,797 residents
Glendale Heights village18,197 of its 33,176 residents
Hanover Park village10,171 of its 37,470 residents

And 18 smaller places. 5% of this district's people live outside any city, town or named community. How places are counted

ZIP codes

39 ZIP codes have residents in this district. 37 of them are split with other districts. A percentage is the share of that ZIP code's 2020 residents who live here.

60005 (4%)
60007 (3%)
60016 (1%)
60018 (24%)
60056 (10%)
60101 (65%)
60103 (66%)
60106
60107 (20%)
60120 (37%)
60131 (28%)
60133 (27%)
60137 (28%)
60139 (55%)
60148 (5%)
60171 (63%)
60174 (2%)
60176 (52%)
60181 (3%)
60184 (65%)
60185 (99%)
60187 (82%)
60188 (8%)
60189 (49%)
60190
60191 (36%)
60510 (1%)
60555 (62%)
60563 (1%)
60618 (69%)
60622 (28%)
60625 (49%)
60630 (18%)
60634 (94%)
60639 (87%)
60641 (85%)
60647 (84%)
60651 (49%)
60707 (85%)

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

Kamala Harris 65.9%, Donald Trump 34.1%

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.

Where this comes from

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.

Chicago area, enlarged 6 times

Spot a problem with this district? Email us about IL-03.