- Lead
- 7,268
- Total
- 46,812
- vs nation
- D+17.0
Illinois 98th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 12,613
- Total
- 50,474
- vs nation
- D+20.5
- Lead
- 9,970
- Total
- 44,739
- vs nation
- D+20.2
- Lead
- 9,003
- Total
- 40,973
- vs nation
- D+18.1
- Lead
- 12,700
- Total
- 42,856
- vs nation
- D+22.4
- Lead
- 4,189
- Total
- 35,983
- vs nation
- D+14.1
- Lead
- 3,942
- Total
- 27,697
- vs nation
- D+13.7
- Lead
- 4,319
- Total
- 21,860
- vs nation
- D+11.2
Key facts
- 2024 presidential margin
- D+15.5MIT Election Lab
- Population
- 108,5052024 5-year
- Population density
- 2,949 / sq mi2024 5-year · TIGER/Line
- Land area
- 36.8 sq miTIGER/Line
- Median household income
- $96,4172024 5-year
- White (non-Hispanic)
- 48.5%2024 5-year
- Black
- 14.4%2024 5-year
- Hispanic / Latino
- 25.7%2024 5-year
- Peak Democratic margin
- D+29.6 in 2008MIT Election Lab
- Peak Republican margin
- R+42.4 in 1920MIT Election Lab
- Most similar
- State House District 85, IL · twin score 97.6
presidential history
Party record book
Illinois 98th State House District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2024 (partial returns from 1876) · 38 presidential cycles · 38 with a vote-share denominator · 34 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Lyndon B. Johnson1964
64.5%
8,471 votes · D+29.0 · modeled estimate
Runner-up · Barack Obama, 2008 · 64.0%
Republican
Warren G. Harding1920
68.6%
2,623 votes · R+42.4 · modeled estimate
Runner-up · Theodore Roosevelt, 1904 · 58.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
30,972votes
61.4% of the vote · D+25.0 · modeled estimate
Runner-up · Barack Obama, 2008 · 27,436 votes
Republican
Donald Trump2024
19,245votes
41.1% of the vote · D+15.5 · modeled estimate
Runner-up · Donald Trump, 2020 · 18,359 votes
Best relative to the U.S.
This Place’s margin against the national margin in the same election — positive when it leaned toward the party more than the country did.
Democratic
Al Smith1928
+23.6pts D vs U.S.
Place D+6.2 · U.S. R+17.5 · modeled estimate
Runner-up · Barack Obama, 2008 · +22.4 pts
Republican
Warren G. Harding1920
+16.2pts R vs U.S.
Place R+42.4 · U.S. R+26.2 · modeled estimate
Runner-up · Charles E. Hughes, 1916 · +13.5 pts
Current officeholders
State legislative officeholder from OpenStates nightly current-legislator data.
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each row is a county-allocated estimate of U.S. House votes for this district — county returns apportioned onto its boundary, not precinct-counted. “Vote lead” is the estimated local lead here, not necessarily the winner of the full contest.
In 2024 it voted Democratic by D+15.5, against D+29.6 in 2008. About 31,800 residents lived here, with White alone at 62.3% in the 2024 ACS 5-year.
Across the recorded series it reached a Democratic high of 29.6 points in 2008 and a Republican high of 42.4 points in 1920. Between 2020 and 2024 the district moved 9.5 points toward the Republican candidate; the 2024 margin was 15.5 points.
A population of 108,505, a 49% non-Hispanic-white share, and a median household income of $96,417 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 85 and State House District 86.
The state-house districts whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
District research tools
Open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report → · Browse all comparisons →
Illinois 98th State House District. Akashic. https://akashic.app/sld-lower/17098/. Accessed May 20, 2026. License: CC BY 4.0.