New Hampshire State House District Hillsborough 21 · 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
67.9%
1,724 votes · D+35.8 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1940 · 63.7%
Republican
Ronald Reagan1984
68.2%
2,249 votes · R+38.1 · modeled estimate
Runner-up · William McKinley, 1896 · 64.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
3,367votes
59.8% of the vote · D+21.3 · modeled estimate
Runner-up · Barack Obama, 2008 · 3,126 votes
Republican
George W. Bush2004
2,749votes
49.2% of the vote · D+0.6 · modeled estimate
Runner-up · Mitt Romney, 2012 · 2,488 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
+29.7pts D vs U.S.
Place D+12.2 · U.S. R+17.5 · modeled estimate
Runner-up · Franklin D. Roosevelt, 1944 · +19.8 pts
Republican
William McKinley1896
+32.7pts R vs U.S.
Place R+38.8 · U.S. R+6.1 · modeled estimate
Runner-up · George H. W. Bush, 1988 · +20.0 pts
current representation
Current officeholders
DChristine SeibertState House · Hillsborough 21
DMatt WilhelmState House · Hillsborough 21
State legislative officeholder from OpenStates nightly current-legislator data.
U.S. House elections · 2 House
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.
Source · Akashic county-allocated estimate from certified county returns, House; not precinct-counted.
Year
Vote lead
Democratic
Republican
Total
2020
D
53.9%2,703
46.1%2,313
5,016
2018
D
55.1%1,990
44.9%1,623
3,613
Hillsborough 21 sits within New Hampshire's most populous county and returned a D+7.5 margin in 2024, placing it modestly left of the state's competitive statewide results.
Across the recorded series it reached a Democratic high of 35.8 points in 1964 and a Republican high of 38.8 points in 1896. Between 2020 and 2024 the district moved 13.9 points toward the Republican candidate; the 2024 margin was 7.4 points.
A population of 9,696, a 85% non-Hispanic-white share, and a median household income of $118,324 describe the district. The district's voting pattern over the last decade is most similar to that of State House District Hillsborough 17 and State House District Hillsborough 04.
Akashic
Political twins — state-house districts
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.
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 → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
New Hampshire State House District Hillsborough 21. Akashic. https://akashic.app/sld-lower/33521/. Accessed May 20, 2026. License: CC BY 4.0.
How did New Hampshire State House District Hillsborough 21 vote in 2024?
In 2024, New Hampshire State House District Hillsborough 21 voted Democratic by 7.4 points (D+7.4), carried by the Democratic candidate. Out of 4,389 votes cast, 2,322 went Democratic and 1,996 went Republican.
When did New Hampshire State House District Hillsborough 21 last vote Republican?
The most recent presidential election in which New Hampshire State House District Hillsborough 21 voted Republican was 1988.
How many people live in New Hampshire State House District Hillsborough 21?
New Hampshire State House District Hillsborough 21 has a population of 9,696 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in New Hampshire State House District Hillsborough 21?
Median household income in New Hampshire State House District Hillsborough 21 is $118,324 — above the national median of $80,734. The New Hampshire state median is $99,031.
What is the political history of New Hampshire State House District Hillsborough 21?
Akashic tracks 38 presidential elections in New Hampshire State House District Hillsborough 21 from 1876 to 2024. Of those, 21 went Democratic and 17 went Republican.