- Lead
- 4,210
- Total
- 24,233
- vs nation
- D+18.8
Maine 31st State Senate District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 4,338
- Total
- 24,072
- vs nation
- D+13.6
- Lead
- 2,012
- Total
- 20,792
- vs nation
- D+7.6
- Lead
- 4,277
- Total
- 19,832
- vs nation
- D+17.7
- Lead
- 5,145
- Total
- 20,230
- vs nation
- D+18.2
- Lead
- 2,723
- Total
- 20,203
- vs nation
- D+15.9
- Lead
- 1,639
- Total
- 17,336
- vs nation
- D+8.9
- Lead
- 3,558
- Total
- 15,109
- vs nation
- D+15.0
Key facts
- 2024 presidential margin
- D+17.4MIT Election Lab
- Population
- 37,7172024 5-year
- Population density
- 436 / sq mi2024 5-year · TIGER/Line
- Land area
- 86.5 sq miTIGER/Line
- Median household income
- $84,4942024 5-year
- White (non-Hispanic)
- 91.0%2024 5-year
- Black
- 1.2%2024 5-year
- Hispanic / Latino
- 2.0%2024 5-year
- Peak Democratic margin
- D+47.5 in 1964MIT Election Lab
- Peak Republican margin
- R+38.1 in 1924MIT Election Lab
- Most similar
- State Senate District 34, ME · twin score 95.9
presidential history
Party record book
Maine 31st 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
73.8%
6,545 votes · D+47.5 · modeled estimate
Runner-up · Barack Obama, 2008 · 61.9%
Republican
Theodore Roosevelt1904
66.3%
1,248 votes · R+36.2 · modeled estimate
Runner-up · Calvin Coolidge, 1924 · 65.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Kamala Harris2024
13,982votes
57.7% of the vote · D+17.4 · modeled estimate
Runner-up · Joe Biden, 2020 · 13,867 votes
Republican
Donald Trump2024
9,772votes
40.3% of the vote · D+17.4 · modeled estimate
Runner-up · Donald Trump, 2020 · 9,529 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
+26.1pts D vs U.S.
Place D+25.4 · U.S. R+0.7 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · +24.9 pts
Republican
William McKinley1896
+24.4pts R vs U.S.
Place R+30.5 · U.S. R+6.1 · modeled estimate
Runner-up · Herbert Hoover, 1932 · +20.1 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 |
|---|---|---|---|---|
| 2018 | D | 60.3%9,015 | 39.7%5,924 | 14,939 |
The district recorded a Democratic presidential margin of D+17.4 in 2024, compared with D+25.4 in 2008. About 18,600 residents lived here, with White alone at 90.6% in the 2024 ACS 5-year.
Across the recorded series it reached a Democratic high of 47.5 points in 1964 and a Republican high of 38.1 points in 1924. Between 2020 and 2024 the district moved 0.6 points toward the Republican candidate; the 2024 margin was 17.4 points.
A population of 37,717, a 91% non-Hispanic-white share, and a median household income of $84,494 describe the district. The district's voting pattern over the last decade is most similar to that of State Senate District 34 and State Senate District 10.
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 31st State Senate District. Akashic. https://akashic.app/sld-upper/23031/. Accessed May 20, 2026. License: CC BY 4.0.