- Lead
- 22,734
- Total
- 66,842
- vs nation
- D+35.5
Massachusetts Third Suffolk District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 34,015
- Total
- 73,022
- vs nation
- D+42.1
- Lead
- 27,428
- Total
- 68,014
- vs nation
- D+38.2
- Lead
- 19,517
- Total
- 62,129
- vs nation
- D+27.6
- Lead
- 17,899
- Total
- 59,526
- vs nation
- D+22.8
- Lead
- 14,156
- Total
- 53,783
- vs nation
- D+28.8
- Lead
- 12,864
- Total
- 48,433
- vs nation
- D+26.0
- Lead
- 12,830
- Total
- 44,036
- vs nation
- D+20.6
Key facts
- 2024 presidential margin
- D+34.0MIT Election Lab
- Population
- 181,9252024 5-year
- Population density
- 12,812 / sq mi2024 5-year · TIGER/Line
- Land area
- 14.2 sq miTIGER/Line
- Median household income
- $102,4892024 5-year
- White (non-Hispanic)
- 55.2%2024 5-year
- Black
- 3.9%2024 5-year
- Hispanic / Latino
- 28.1%2024 5-year
- Peak Democratic margin
- D+53.9 in 1964MIT Election Lab
- Peak Republican margin
- R+53.1 in 1896MIT Election Lab
- Most similar
- Middlesex and Suffolk District, MA · twin score 92.6
presidential history
Party record book
Massachusetts Third Suffolk 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
76.8%
47,327 votes · D+53.9 · modeled estimate
Runner-up · Joe Biden, 2020 · 72.3%
Republican
William McKinley1896
73.2%
18,982 votes · R+53.1 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 72.1%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
52,793votes
72.3% of the vote · D+46.6 · modeled estimate
Runner-up · Harry S. Truman, 1948 · 48,856 votes
Republican
Dwight D. Eisenhower1956
57,478votes
61.8% of the vote · R+24.0 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · 57,262 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
Joe Biden2020
+42.1pts D vs U.S.
Place D+46.6 · U.S. D+4.5 · modeled estimate
Runner-up · Hillary Clinton, 2016 · +38.2 pts
Republican
William McKinley1896
+47.0pts R vs U.S.
Place R+53.1 · U.S. R+6.1 · modeled estimate
Runner-up · William H. Taft, 1908 · +22.5 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 | 92.7%54,541 | 7.3%4,271 | 58,812 |
| 2020 | D | 96.7%60,825 | 3.3%2,063 | 62,888 |
Anchored in dense urban Boston neighborhoods, the Third Suffolk consistently delivers among the largest Democratic presidential margins in the Massachusetts Senate, reflecting a heavily renter-majority, majority-minority electorate with low car-ownership rates.
Across the recorded series it reached a Democratic high of 53.9 points in 1964 and a Republican high of 53.1 points in 1896. Between 2020 and 2024 the district moved 12.6 points toward the Republican candidate; the 2024 margin was 34.0 points.
A population of 181,925, a 55% non-Hispanic-white share, and a median household income of $102,489 describe the district. The district's voting pattern over the last decade is most similar to that of Middlesex and Suffolk District and Third Essex 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 →
Massachusetts Third Suffolk District. Akashic. https://akashic.app/sld-upper/25D25/. Accessed May 20, 2026. License: CC BY 4.0.