- Lead
- 56,756
- Total
- 110,431
- vs nation
- D+52.9
New York 21st State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 75,801
- Total
- 119,058
- vs nation
- D+59.2
- Lead
- 71,983
- Total
- 108,204
- vs nation
- D+64.4
- Lead
- 68,917
- Total
- 99,464
- vs nation
- D+65.4
- Lead
- 65,557
- Total
- 102,131
- vs nation
- D+56.9
- Lead
- 51,427
- Total
- 91,920
- vs nation
- D+58.4
- Lead
- 57,431
- Total
- 82,970
- vs nation
- D+68.7
- Lead
- 50,177
- Total
- 72,400
- vs nation
- D+60.8
Key facts
- 2024 presidential margin
- D+51.4MIT Election Lab
- Population
- 319,1692024 5-year
- Population density
- 40,401 / sq mi2024 5-year · TIGER/Line
- Land area
- 7.9 sq miTIGER/Line
- Median household income
- $85,5662024 5-year
- White (non-Hispanic)
- 23.7%2024 5-year
- Black
- 47.7%2024 5-year
- Hispanic / Latino
- 12.0%2024 5-year
- Peak Democratic margin
- D+69.3 in 1996MIT Election Lab
- Peak Republican margin
- R+32.2 in 1920MIT Election Lab
- Most similar
- State Senate District 19, NY · twin score 98.1
presidential history
Party record book
New York 21st State Senate District · the strongest Democratic and Republican presidential performances recorded here, measured three ways.
1892–2020 (partial returns from 1876) · 37 presidential cycles · 37 with a vote-share denominator · 33 with a national benchmark
Highest vote share
Largest share of the presidential candidate vote cast here.
Democratic
Barack Obama2012
84.2%
83,778 votes · D+69.3 · modeled estimate
Runner-up · Al Gore, 2000 · 83.1%
Republican
Warren G. Harding1920
61.4%
34,860 votes · R+32.2 · modeled estimate
Runner-up · William McKinley, 1896 · 53.2%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
97,034votes
81.5% of the vote · D+63.7 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 94,911 votes
Republican
Dwight D. Eisenhower1956
54,890votes
41.5% of the vote · D+16.9 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · 53,256 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 Gore2000
+68.7pts D vs U.S.
Place D+69.2 · U.S. D+0.5 · modeled estimate
Runner-up · Barack Obama, 2012 · +65.4 pts
Republican
Warren G. Harding1920
+6.0pts R vs U.S.
Place R+32.2 · U.S. R+26.2 · modeled estimate
Runner-up · William McKinley, 1896 · +3.6 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.
The district recorded a Democratic presidential margin of D+51.4 in 2024, compared with D+64.2 in 2008. No racial group formed a majority of its residents in the 2024 ACS 5-year, with White residents at 37.9%.
Across the recorded series it reached a Democratic high of 69.3 points in 1996 and a Republican high of 32.2 points in 1920. Between 2020 and 2024 the district moved 12.3 points toward the Republican candidate; the 2024 margin was 51.4 points.
A population of 319,169, a 24% non-Hispanic-white share, and a median household income of $85,566 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 19 and State Senate District 14.
The state-senate 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 →
New York 21st State Senate District. Akashic. https://akashic.app/sld-upper/36021/. Accessed May 20, 2026. License: CC BY 4.0.