New Hampshire 21st State Senate District, New Hampshire: Bellwether district. In 2024, voted D+4%. Republican peak: R+41 in 1896.
Key facts
- 2024 presidential margin
- D+4MIT Election Lab
- Political archetype
- BellwetherAkashic typology
- Population
- 42,8592024 5-year
- Median household income
- $104,5752024 5-year
- White (non-Hispanic)
- 89.5%2024 5-year
- Black
- 1.0%2024 5-year
- Hispanic / Latino
- 3.5%2024 5-year
- Peak Democratic margin
- D+27 in 1964MIT Election Lab
- Peak Republican margin
- R+41 in 1896MIT Election Lab
Constituent county margins for State Senate District 21, NHOne cell per constituent county, colored by 2024 presidential margin from deep red (Republican) through neutral to deep blue (Democratic), ordered bluest first.
R+60D+60
One cell per constituent county. Ordered by 2024 D-vs-R margin (bluest first). Hover for county-level numbers.
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| D | 13,383 | 12,363 | 26,118 | ||
| D | 13,462 | 11,480 | 25,428 | ||
| D | 10,992 | 10,878 | 23,416 | ||
| D | 11,172 | 10,345 | 21,869 | ||
| D | 11,724 | 9,656 | 21,566 | ||
| D | 10,372 | 9,787 | 20,330 | ||
| D | 8,247 | 7,911 | 17,073 | ||
| D | 7,383 | 5,502 | 14,582 | ||
| D | 6,376 | 5,816 | 16,047 | ||
| R | 5,057 | 7,709 | 12,958 | ||
| R | 3,752 | 7,216 | 11,012 | ||
| R | 3,218 | 5,770 | 10,602 | ||
| R | 4,347 | 4,831 | 9,309 | ||
| R | 3,386 | 5,322 | 8,798 | ||
| R | 3,493 | 3,940 | 7,717 | ||
| D | 4,619 | 2,655 | 7,274 | ||
| R | 3,375 | 4,048 | 7,423 | ||
| R | 2,180 | 4,354 | 6,536 | ||
| R | 2,626 | 3,950 | 6,576 | ||
| R | 2,596 | 2,857 | 5,502 | ||
| D | 2,819 | 2,641 | 5,462 | ||
| D | 2,931 | 2,516 | 5,447 | ||
| D | 2,526 | 2,345 | 4,984 | ||
| R | 2,311 | 2,430 | 4,761 | ||
| R | 1,674 | 2,835 | 4,517 | ||
| R | 1,402 | 2,419 | 3,953 | ||
| R | 1,319 | 2,298 | 3,636 | ||
| R | 1,011 | 1,027 | 2,059 | ||
| D | 829 | 748 | 1,989 | ||
| R | 824 | 1,213 | 2,097 | ||
| R | 843 | 1,249 | 2,141 | ||
| R | 908 | 1,277 | 2,244 | ||
| R | 554 | 1,389 | 2,016 | ||
| R | 1,063 | 1,158 | 2,257 | ||
| — | — | — | — | ||
| — | — | — | — | ||
| — | — | — | — | ||
| — | — | — | — |
Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
Irish
23.3%
English
19.7%
Italian
11.2%
French
10.0%
German
8.9%
American
4.2%
Polish
2.3%
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
Age distribution by sex
Median age: 41.9 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
Median household income
2024 inflation-adjusted dollars
$104,575
State Senate District 21 ranks near the middle of US counties.
State Senate District 21$104,575
New Hampshire$99,031
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
6.6%
Child poverty is below the national average.
Children under 185.8%
Working age (18–64)6.5%
Seniors (65+)8.9%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
94.1%
speak English only
Other Indo-European2.5%
Spanish1.7%
Asian & Pacific Islander1.4%
Other languages0.4%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 73.6% of residents not counted as adherents by any reporting body.
With a 2024 presidential margin of D+37.5, this district ranks among the most lopsided in the state senate map, suggesting a dense urban or college-town core that consistently produces outsized Democratic margins.
The Democratic margin in New Hampshire 21st State Senate District has rarely exceeded twenty-seven points in modern history; the Republican margin has rarely exceeded forty-one points. 2024 delivered the district to the Democratic candidate by four points.
Its demographics resemble the country more than they resemble most districts. A 90% non-Hispanic-white share, a 7% poverty rate, and a median household income of $104,575 — all within the broad national range.
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.
State Senate District 21, New Hampshire. Akashic. https://akashic.app/sld-upper/33021/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
Frequently asked questions
How did State Senate District 21, New Hampshire vote in 2024?
In 2024, State Senate District 21, New Hampshire voted Democratic by 3.9 points (D+4), carried by the Democratic candidate. Out of 26,118 votes cast, 13,383 went Democratic and 12,363 went Republican.
What is State Senate District 21, New Hampshire's political archetype?
Akashic classifies State Senate District 21, New Hampshire as a "Bellwether" district based on its long-arc presidential voting pattern. Across 38 elections in the dataset, the district has voted Democratic 14 times, Republican 20 times, and other 0 times.
When did State Senate District 21, New Hampshire last vote Republican?
The most recent presidential election in which State Senate District 21, New Hampshire voted Republican was 1988.
How many people live in State Senate District 21, New Hampshire?
State Senate District 21, New Hampshire has a population of 42,859 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in State Senate District 21, New Hampshire?
Median household income in State Senate District 21, New Hampshire is $104,575 — above the national median of $80,734. The New Hampshire state median is $99,031.
What is the political history of State Senate District 21, New Hampshire?
Akashic tracks 38 presidential elections in State Senate District 21, New Hampshire from 1876 to 2024. Of those, 14 went Democratic and 20 went Republican. The district's archetype — "Bellwether" — captures the overall trajectory of that voting record.