- Lead
- 1,350
- Total
- 16,597
- vs nation
- D+9.6
Maine 21st State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 2,361
- Total
- 17,360
- vs nation
- D+9.1
- Lead
- 866
- Total
- 16,761
- vs nation
- D+3.1
- Lead
- 4,543
- Total
- 16,467
- vs nation
- D+23.7
- Lead
- 5,186
- Total
- 17,313
- vs nation
- D+22.7
- Lead
- 4,512
- Total
- 17,572
- vs nation
- D+28.1
- Lead
- 4,198
- Total
- 15,414
- vs nation
- D+26.7
- Lead
- 6,313
- Total
- 14,908
- vs nation
- D+33.8
Key facts
- 2024 presidential margin
- D+8.1MIT Election Lab
- Population
- 37,1212024 5-year
- Population density
- 1,089 / sq mi2024 5-year · TIGER/Line
- Land area
- 34.1 sq miTIGER/Line
- Median household income
- $55,3932024 5-year
- White (non-Hispanic)
- 77.1%2024 5-year
- Black
- 13.7%2024 5-year
- Hispanic / Latino
- 2.5%2024 5-year
- Peak Democratic margin
- D+69.3 in 1964MIT Election Lab
- Peak Republican margin
- R+25.2 in 1896MIT Election Lab
- Most similar
- State Senate District 16, ME · twin score 91.0
presidential history
Party record book
Maine 21st State Senate 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
84.6%
10,734 votes · D+69.3 · modeled estimate
Runner-up · Hubert Humphrey, 1968 · 77.1%
Republican
William McKinley1896
59.6%
1,444 votes · R+25.2 · modeled estimate
Runner-up · Theodore Roosevelt, 1904 · 54.8%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Barack Obama2008
11,080votes
64.0% of the vote · D+30.0 · modeled estimate
Runner-up · John Kerry, 2004 · 10,883 votes
Republican
Donald Trump2024
7,427votes
44.7% of the vote · D+8.1 · modeled estimate
Runner-up · Donald Trump, 2016 · 7,332 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
Hubert Humphrey1968
+56.1pts D vs U.S.
Place D+55.4 · U.S. R+0.7 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · +46.7 pts
Republican
William McKinley1896
+19.1pts R vs U.S.
Place R+25.2 · U.S. R+6.1 · modeled estimate
Runner-up · Benjamin Harrison, 1892 · −2.9 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 | 53.4%10,113 | 46.6%8,815 | 18,928 |
Maine 21st State Senate District sits in New England. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 69.3 points in 1964 and a Republican high of 25.2 points in 1896. Between 2020 and 2024 the district moved 5.5 points toward the Republican candidate; the 2024 margin was 8.1 points.
A population of 37,121, a 77% non-Hispanic-white share, and a median household income of $55,393 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 16 and Franklin Senatorial District.
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 →
Maine 21st State Senate District. Akashic. https://akashic.app/sld-upper/23021/. Accessed May 20, 2026. License: CC BY 4.0.