- Lead
- 31,331
- Total
- 58,491
- vs nation
- D+55.0
Ohio 21st State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 35,975
- Total
- 64,470
- vs nation
- D+51.3
- Lead
- 34,183
- Total
- 63,251
- vs nation
- D+52.0
- Lead
- 39,565
- Total
- 67,158
- vs nation
- D+55.1
- Lead
- 40,199
- Total
- 69,298
- vs nation
- D+50.7
- Lead
- 37,485
- Total
- 69,351
- vs nation
- D+56.5
- Lead
- 29,049
- Total
- 58,204
- vs nation
- D+49.4
- Lead
- 28,930
- Total
- 56,803
- vs nation
- D+42.4
Key facts
- 2024 presidential margin
- D+53.6MIT Election Lab
- Population
- 125,1252024 5-year
- Population density
- 4,315 / sq mi2024 5-year · TIGER/Line
- Land area
- 29 sq miTIGER/Line
- Median household income
- $62,2602024 5-year
- White (non-Hispanic)
- 43.8%2024 5-year
- Black
- 46.8%2024 5-year
- Hispanic / Latino
- 2.6%2024 5-year
- Peak Democratic margin
- D+61.4 in 1964MIT Election Lab
- Peak Republican margin
- R+30.4 in 1924MIT Election Lab
- Most similar
- State House District 18, OH · twin score 97.2
presidential history
Party record book
Ohio 21st 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
80.7%
58,557 votes · D+61.4 · modeled estimate
Runner-up · Barack Obama, 2012 · 79.1%
Republican
Warren G. Harding1920
53.1%
10,561 votes · R+11.0 · modeled estimate
Runner-up · Theodore Roosevelt, 1904 · 52.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Lyndon B. Johnson1964
58,557votes
80.7% of the vote · D+61.4 · modeled estimate
Runner-up · Barack Obama, 2008 · 54,440 votes
Republican
Dwight D. Eisenhower1956
25,137votes
41.0% of the vote · D+18.0 · modeled estimate
Runner-up · Richard Nixon, 1972 · 23,437 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
John Kerry2004
+56.5pts D vs U.S.
Place D+54.1 · U.S. R+2.5 · modeled estimate
Runner-up · Barack Obama, 2012 · +55.1 pts
Republican
Calvin Coolidge1924
+5.2pts R vs U.S.
Place R+30.4 · U.S. R+25.2 · modeled estimate
Runner-up · Theodore Roosevelt, 1904 · −4.2 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 |
|---|---|---|---|---|
| 2024 | D | 66.9%33,781 | 33.1%16,745 | 50,526 |
| 2020 | D | 64.7%37,543 | 35.3%20,497 | 58,040 |
Ohio 21st State House District sits in the Industrial Midwest. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 61.4 points in 1964 and a Republican high of 30.4 points in 1924. Between 2020 and 2024 the district moved 2.2 points toward the Republican candidate; the 2024 margin was 53.6 points.
A population of 125,125, a 44% non-Hispanic-white share, and a median household income of $62,260 describe the district. The district's voting pattern over the last decade is most similar to that of State House District 18 and State House District 22.
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 →
Ohio 21st State House District. Akashic. https://akashic.app/sld-lower/39021/. Accessed May 20, 2026. License: CC BY 4.0.