- Lead
- 11,782
- Total
- 43,698
- vs nation
- D+28.4
Illinois 84th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 15,942
- Total
- 47,151
- vs nation
- D+29.4
- Lead
- 11,582
- Total
- 40,618
- vs nation
- D+26.4
- Lead
- 8,414
- Total
- 36,359
- vs nation
- D+19.3
- Lead
- 12,310
- Total
- 38,184
- vs nation
- D+25.0
- Lead
- 3,816
- Total
- 31,479
- vs nation
- D+14.6
- Lead
- 2,775
- Total
- 25,785
- vs nation
- D+10.2
- Lead
- 2,983
- Total
- 21,941
- vs nation
- D+5.1
Key facts
- 2024 presidential margin
- D+27.0MIT Election Lab
- Population
- 108,4222024 5-year
- Population density
- 3,752 / sq mi2024 5-year · TIGER/Line
- Land area
- 28.9 sq miTIGER/Line
- Median household income
- $112,8962024 5-year
- White (non-Hispanic)
- 45.2%2024 5-year
- Black
- 10.7%2024 5-year
- Hispanic / Latino
- 20.7%2024 5-year
- Peak Democratic margin
- D+33.8 in 2020MIT Election Lab
- Peak Republican margin
- R+47.5 in 1920MIT Election Lab
- Most similar
- State House District 59, IL · twin score 93.7
presidential history
Party record book
Illinois 84th 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
Joe Biden2020
65.7%
30,992 votes · D+33.8 · modeled estimate
Runner-up · Barack Obama, 2008 · 65.4%
Republican
Warren G. Harding1920
71.5%
1,748 votes · R+47.5 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1956 · 64.3%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
30,992votes
65.7% of the vote · D+33.8 · modeled estimate
Runner-up · Kamala Harris, 2024 · 27,114 votes
Republican
Donald Trump2024
15,332votes
35.1% of the vote · D+27.0 · modeled estimate
Runner-up · Donald Trump, 2020 · 15,050 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
Joe Biden2020
+29.4pts D vs U.S.
Place D+33.8 · U.S. D+4.5 · modeled estimate
Runner-up · Kamala Harris, 2024 · +28.4 pts
Republican
Warren G. Harding1920
+21.3pts R vs U.S.
Place R+47.5 · U.S. R+26.2 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · +19.4 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.
| Year | Vote lead | Democratic | Republican | Total |
|---|---|---|---|---|
| 2020 | D | 58.6%29,035 | 41.4%20,552 | 49,587 |
With a 2024 presidential margin of D+27.0, Illinois House District 84 ranks among the state's more lopsided constituencies. Its voting patterns reflect the dense urban or inner-suburban character common to Cook County's high-turnout precincts.
Across the recorded series it reached a Democratic high of 33.8 points in 2020 and a Republican high of 47.5 points in 1920. Between 2020 and 2024 the district moved 6.8 points toward the Republican candidate; the 2024 margin was 27.0 points.
A population of 108,422, a 45% non-Hispanic-white share, and a median household income of $112,896 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 59 and State House District 49.
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 84th State House District. Akashic. https://akashic.app/sld-lower/17084/. Accessed May 20, 2026. License: CC BY 4.0.