Illinois 99th State House District, Illinois: Populist district. In 2024, voted R+43%. Republican peak: R+43 in 2024.
Key facts
- 2024 presidential margin
- R+43MIT Election Lab
- Political archetype
- PopulistAkashic typology
- Population
- 71,0382024 5-year
- Median household income
- $66,6802024 5-year
- White (non-Hispanic)
- 86.0%2024 5-year
- Black
- 4.6%2024 5-year
- Hispanic / Latino
- 6.4%2024 5-year
- Peak Democratic margin
- D+32 in 1912MIT Election Lab
- Peak Republican margin
- R+43 in 2024MIT Election Lab
Constituent county margins for State House District 99, ILOne cell per constituent county, colored by 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic), ordered bluest first.
R+60D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 8,978 | 23,156 | 32,665 | ||
| R | 9,603 | 23,803 | 34,109 | ||
| R | 8,919 | 21,980 | 32,864 | ||
| R | 11,470 | 19,269 | 31,471 | ||
| R | 14,341 | 18,045 | 32,883 | ||
| R | 12,250 | 21,031 | 33,494 | ||
| R | 13,633 | 18,104 | 32,468 | ||
| R | 13,375 | 14,105 | 31,095 | ||
| D | 14,169 | 13,976 | 35,005 | ||
| R | 15,256 | 17,705 | 33,092 | ||
| R | 12,457 | 21,680 | 34,249 | ||
| R | 12,219 | 22,117 | 36,116 | ||
| R | 15,699 | 19,807 | 35,880 | ||
| R | 12,059 | 23,578 | 35,705 | ||
| R | 14,124 | 19,478 | 36,575 | ||
| D | 21,312 | 15,908 | 37,220 | ||
| R | 17,386 | 21,512 | 38,929 | ||
| R | 14,820 | 22,437 | 37,297 | ||
| R | 15,774 | 22,769 | 38,568 | ||
| R | 17,390 | 17,498 | 35,104 | ||
| R | 17,100 | 18,905 | 36,170 | ||
| R | 21,870 | 22,367 | 44,670 | ||
| D | 24,442 | 17,243 | 42,683 | ||
| D | 25,544 | 13,974 | 39,974 | ||
| R | 15,725 | 20,514 | 36,447 | ||
| R | 13,246 | 15,190 | 33,587 | ||
| R | 11,298 | 17,361 | 30,678 | ||
| D | 19,098 | 15,644 | 35,860 | ||
| D | 9,458 | 3,556 | 18,724 | ||
| D | 10,769 | 9,139 | 20,779 | ||
| R | 8,546 | 9,241 | 19,270 | ||
| D | 11,803 | 9,795 | 22,034 | ||
| D | 11,394 | 10,125 | 21,858 | ||
| D | 10,254 | 7,840 | 19,326 | ||
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Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
25.3%
English
12.0%
Irish
10.6%
American
6.2%
Italian
2.0%
Scottish
1.6%
French
1.4%
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: 41.1 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$66,680
State House District 99 ranks near the middle of US counties.
State House District 99$66,680
Illinois$83,390
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
12.8%
Child poverty is below the national average.
Children under 1813.8%
Working age (18–64)12.4%
Seniors (65+)13.3%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
93.7%
speak English only
Spanish4.5%
Other Indo-European1.0%
Asian & Pacific Islander0.4%
Other languages0.3%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 42.2% of residents not counted as adherents by any reporting body.
With a 2024 presidential margin of R+18.4, this district reflects the broader rural and small-city realignment visible across downstate Illinois, where once-competitive territory has shifted decisively over the past decade.
The Democratic margin in Illinois 99th State House District peaked at thirty-two points in 1912. By 1996 the district had flipped, voting Republican for the first time in many years. The 2024 margin was forty-three points, the most Republican-leaning result in the district's modern history.
The economic context is the key. The median household income of $66,680 sits well below state and national norms, and 13% of residents live below the federal poverty line. The shift here is part of a broader realignment of working-class places across the country.
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 99, Illinois. Akashic. https://akashic.app/sld-lower/17099/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did State House District 99, Illinois vote in 2024?
In 2024, State House District 99, Illinois voted Republican by 43.4 points (R+43), carried by the Republican candidate. Out of 32,665 votes cast, 8,978 went Democratic and 23,156 went Republican.
What is State House District 99, Illinois's political archetype?
Akashic classifies State House District 99, Illinois as a "Populist" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 10 times, Republican 24 times, and other 0 times.
When did State House District 99, Illinois last vote Democratic?
The most recent presidential election in which State House District 99, Illinois voted Democratic was 1992.
How many people live in State House District 99, Illinois?
State House District 99, Illinois has a population of 71,038 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 99, Illinois?
Median household income in State House District 99, Illinois is $66,680 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of State House District 99, Illinois?
Akashic tracks 38 presidential elections in State House District 99, Illinois from 1876 to 2024. Of those, 10 went Democratic and 24 went Republican. The district's archetype — "Populist" — captures the overall trajectory of that voting record.