akashic
1876–2024
State House District 42·Illinois

Illinois 42nd State House District changed direction in the last decade — D+13 in 2024.

1876 — 2024·38 elections
IL
Latest
D+13
in 2024
Archetype
Recent convert
since the recent cycles
Population
85,642
2024 ACS

Illinois 42nd State House District, Illinois: Recent convert district. In 2024, voted D+13%. Republican peak: R+68 in 1920.

Key facts

2024 presidential margin
D+13MIT Election Lab
Political archetype
Recent convertAkashic typology
Population
85,6422024 5-year
Median household income
$112,0962024 5-year
White (non-Hispanic)
64.8%2024 5-year
Black
5.0%2024 5-year
Hispanic / Latino
16.1%2024 5-year
Peak Democratic margin
D+18 in 2020MIT Election Lab
Peak Republican margin
R+68 in 1920MIT Election Lab
2024 results by constituent county
1 counties · 1 D · 0 R
R+60
D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024).
YearWonMarginDemocraticRepublicanTotal
D
+13.1%
23,12917,61142,072
D
+18.0%
25,89617,82944,916
D
+14.4%
21,05315,32439,659
D
+1.1%
18,36717,96136,934
D
+10.8%
21,06016,90938,489
R
−9.6%
16,58420,15837,059
R
−13.3%
14,04818,51333,552
R
−10.8%
11,94415,16029,880
R
−17.2%
10,55016,41634,162
R
−39.4%
8,68220,06628,920
R
−51.9%
6,57820,91627,645
R
−39.8%
6,35316,78826,221
R
−40.4%
6,64316,12023,440
R
−50.2%
5,25315,87021,156
R
−40.8%
4,46511,50117,266
R
−19.8%
6,0999,10515,203
R
−39.0%
4,0769,30213,393
R
−59.7%
2,1278,45710,603
R
−51.8%
2,0716,5508,641
R
−48.6%
1,4304,2175,731
R
−38.1%
1,7233,8575,596
R
−36.3%
1,7433,7525,530
R
−13.0%
1,9972,6134,755
R
−15.7%
1,7082,3724,218
R
−45.3%
9652,5803,565
R
−64.7%
1741,5582,139
R
−68.1%
1921,1311,379
R
−31.4%
4438851,407
O
+13.8%
206105733
R
−36.0%
182417652
R
−44.6%
130376552
R
−31.8%
179356557
R
−42.4%
146379550
R
−6.6%
198228453
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Demographics

Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
16.1%
Irish
13.0%
Italian
9.9%
Polish
9.7%
English
6.2%
American
2.6%
French
1.5%
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
Age distribution by sex
Median age: 40.2 in this county, 39.1 nationally
Male
Age
Female
0.7%
85+
1.3%
2.2%
75–84
2.8%
4.9%
65–74
5.4%
6.6%
55–64
6.9%
6.4%
45–54
6.4%
7.0%
35–44
6.7%
6.3%
25–34
6.1%
4.2%
18–24
4.1%
8.5%
5–17
8.1%
2.8%
<5
2.7%
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$112,096
State House District 42 ranks near the middle of US counties.
State House District 42$112,096
Illinois$83,390
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
6.6%
Child poverty is below the national average.
Children under 187.0%
Working age (18–64)6.2%
Seniors (65+)9.1%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
70.4%
speak English only
Spanish11.5%
Other Indo-European11.5%
Asian & Pacific Islander5.3%
Other languages1.3%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Catholic & Orthodox
37.4%
Non-Christian
9.4%
Other Christian
7.6%
Mainline Protestant
6.6%
Methodist
1.8%
Pentecostal & Holiness
0.4%
Baptist
0.4%
Source · 2020 US Religion Census. Remaining 36.4% of residents not counted as adherents by any reporting body.

Illinois 42nd State House District in the Upper Midwest has, until recently, been a Republican district. The district's earlier pattern was unmistakable — multiple decades of consistent margins for the other party.

The 2008 election was the turning point, when the Democratic candidate carried the district by eleven points. The 2024 margin was thirteen points, in line with the district's new direction.

The demographics suggest why. A population of 85,642, a 65% non-Hispanic-white share, and a median household income of $112,096 situate the district in the broader realignment patterns of recent cycles.

Compare two places, side by side

Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →

Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
State House District 42, Illinois. Akashic. https://akashic.app/sld-lower/17042/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0

Frequently asked questions

How did State House District 42, Illinois vote in 2024?
In 2024, State House District 42, Illinois voted Democratic by 13.1 points (D+13), carried by the Democratic candidate. Out of 42,072 votes cast, 23,129 went Democratic and 17,611 went Republican.
What is State House District 42, Illinois's political archetype?
Akashic classifies State House District 42, Illinois as a "Recent convert" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 5 times, Republican 28 times, and other 1 times.
When did State House District 42, Illinois last vote Republican?
The most recent presidential election in which State House District 42, Illinois voted Republican was 2004.
How many people live in State House District 42, Illinois?
State House District 42, Illinois has a population of 85,642 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in State House District 42, Illinois?
Median household income in State House District 42, Illinois is $112,096 — above the national median of $80,734. The Illinois state median is $83,390.
What is the political history of State House District 42, Illinois?
Akashic tracks 38 presidential elections in State House District 42, Illinois from 1876 to 2024. Of those, 5 went Democratic and 28 went Republican. The district's archetype — "Recent convert" — captures the overall trajectory of that voting record.