state house districtNew Hampshire State House District Hillsborough 21
presidential margin
2004–2024 · Democratic minus Republican
2004D+0.6
2008D+8.1
2012D+3.9
2016D+13.6
2020D+21.3
2024D+7.5
net swing · 2004→2024D+6.9D+0.6 → D+7.5
vs. U.S. · 2024D+9.0D+7.5 vs R+1.5
presidential returns
2024 turnout 54.9% of 7,941 citizens 18+
Year
Democrat
Republican
Others
Total
CVAP
Turnout
2024
2,323
1,996
38
4,357
7,941
54.9%
2020
3,368
2,168
94
5,630
7,651†
73.6%
2016
2,988
2,231
363
5,582
7,340†
76.0%
2012
2,764
2,554
89
5,407
7,135†
75.8%
2008
2,926
2,486
38
5,450
7,050†
77.3%
2004
2,784
2,749
54
5,587
6,965†
80.2%
† Citizen voting-age population estimated for prior cycles from the constituent-county ACS trend anchored to the current figure. Source: ACS 5-year, table B05003.
——
D+60R+60
20042024
Boundary by 2024 margin · Precinct returns · VEST · MIT Election Lab
People and households
Who lives here
Exact values for this place, its state, and the United States.
Race · ethnicity · ancestry
Communities and origins
GroupNH HD 21New HampshireUnited States
Irish21.4%20.6%9.4%
English15.6%18.3%9.5%
French11.1%10.5%1.6%
Italian10.8%9.8%4.8%
French Canadian8.8%7.2%—
German8.7%8.6%12.5%
Polish4.0%—2.2%
American3.6%4.2%5.3%
Puerto Rican1.7%1.4%1.8%
Dominican1.2%0.8%0.7%
Mexican0.7%0.8%11.3%
Colombian0.3%0.2%0.4%
Honduran0.2%—0.3%
Salvadoran0.2%—0.7%
Spanish0.2%0.2%—
Asian Indian1.2%0.7%1.4%
Chinese0.4%0.4%1.3%
Filipino0.3%0.3%0.9%
Vietnamese0.3%0.2%0.6%
Korean0.2%0.2%0.4%
Cambodian0.2%——
Nepalese0.2%——
African American†0.8%0.5%9.9%
African0.3%—0.5%
Haitian0.3%—0.3%
Jamaican0.2%—0.4%
Hispanic or Latino counts residents of any race; the race groups count only their non-Hispanic residents, so the groups are mutually exclusive and sum to 100%. Expand a row to see ancestries reported within that group.
Age and life stage
Measure
NH HD 21
New Hampshire
United States
Median age
38
43.5
39.1
Age 18–24
8.2%
8.7%
9.2%
Age 65 and older
17.3%
20.3%
17.2%
Household economy
Measure
NH HD 21
New Hampshire
United States
Median household income
$118,324
$99,031
$84,427
Poverty rate
7.3%
7.3%
12.5%
Bachelor's degree or higher (25+)
41.5%
40.7%
35.6%
Languages at home
Measure
NH HD 21
New Hampshire
United States
Speaks a non-English language at home
13.9%
8.0%
22.3%
Spanish
5.3%
2.6%
13.6%
French (incl. Cajun & Haitian)
1.8%
1.2%
0.7%
Other Indo-European
2.5%
1.4%
2.0%
Other Asian & Pacific Island
1.1%
0.6%
1.1%
Religious landscape
Measure
NH HD 21
New Hampshire
United States
Catholic
—
16.0%
18.6%
Evangelical Protestant
—
4.8%
16.5%
Unclaimed / not counted
—
72.8%
51.5%
American Community Survey 2024 5-year (CVAP, income, age, poverty, education, language, race, ancestry) · presidential returns from MIT Election Lab through 2024 · 2020 U.S. Religion Census (ASARB) — congregational adherents; unclaimed is the residual not counted by congregations.
New Hampshire State House District Hillsborough 21
presidential history
Presidential margin, 2004–2024
Democratic minus Republican, by election
Presidential margin over time
Year
Margin (D minus R)
2004
+0.6%
2008
+8.1%
2012
+3.9%
2016
+13.6%
2020
+21.3%
2024
+7.5%
DemocraticRepublican
6 presidential elections
Third column names the leading third-party or independent finisher. Source · MIT Election Lab · ICPSR · VEST (precinct-level 2024). Swing · margin change from the prior cycle. vs U.S. · margin relative to the national result that year. Third-party votes in 2012 are allocated from certified county totals by this place's share of each county's two-party vote — that cycle's precinct source records two-party splits. † 2024 sub-county results are estimated: the source's block-level detail for this cycle was unreliable — either county/municipality-level consolidated reporting (COVID-era) or a precinct-to-block allocation that misplaced votes — so the figures are allocated from the constituent county totals in proportion to the place and scaled to certified totals.
Year
Won
Democratic
Republican
Other
Margin
Swing
vs U.S.
Total
D
53.3%Harris2,323
45.8%Trump1,996
0.9%
D+7.5
R+13.8
D+9.0
4,357
D
59.8%Biden3,368
38.5%Trump2,168
1.7%
D+21.3
D+7.8
D+16.9
5,630
D
53.5%Clinton2,988
40.0%Trump2,231
6.5%
D+13.6
D+9.7
D+11.5
5,582
D
51.1%Obama2,764
47.2%Romney2,554
1.6%
D+3.9
R+4.2
±0.0
5,407
D
53.7%Obama2,926
45.6%McCain2,486
0.7%
D+8.1
D+7.4
D+0.8
5,450
D
49.8%Kerry2,784
49.2%Bush2,749
1.0%
D+0.6
—
D+3.1
5,587
current representation
Current officeholders
DChristine SeibertState House · Hillsborough 21
DMatt WilhelmState House · Hillsborough 21
State legislative officeholder from OpenStates nightly current-legislator data.
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 21.3 points in 2020. Between 2020 and 2024 the district moved 13.8 points toward the Republican candidate; the 2024 margin was 7.5 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 →
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 7.5 points (D+7.5), carried by the Democratic candidate. Out of 4,357 votes cast, 2,323 went Democratic and 1,996 went Republican.
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 6 presidential elections in New Hampshire State House District Hillsborough 21 from 2004 to 2024. Of those, 6 went Democratic and 0 went Republican.
