- Lead
- 11,210
- Total
- 16,716
- vs nation
- D+68.5
Massachusetts 139th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 14,058
- Total
- 19,189
- vs nation
- D+68.8
- Lead
- 12,741
- Total
- 18,404
- vs nation
- D+67.1
- Lead
- 10,813
- Total
- 15,947
- vs nation
- D+64.0
- Lead
- 10,234
- Total
- 15,231
- vs nation
- D+59.9
- Lead
- 9,016
- Total
- 13,731
- vs nation
- D+68.1
- Lead
- 7,869
- Total
- 12,816
- vs nation
- D+60.9
- Lead
- 7,515
- Total
- 11,754
- vs nation
- D+55.4
Key facts
- 2024 presidential margin
- D+67.1MIT Election Lab
- Population
- 45,4272024 5-year
- Population density
- 22,714 / sq mi2024 5-year · TIGER/Line
- Land area
- 2 sq miTIGER/Line
- Median household income
- $86,3682024 5-year
- White (non-Hispanic)
- 58.3%2024 5-year
- Black
- 4.7%2024 5-year
- Hispanic / Latino
- 10.8%2024 5-year
- Peak Democratic margin
- D+80.7 in 1964MIT Election Lab
- Peak Republican margin
- R+10.6 in 1896MIT Election Lab
- Most similar
- 18th Suffolk District, MA · twin score 98.7
presidential history
Party record book
Massachusetts 139th State House 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
90.1%
15,131 votes · D+80.7 · modeled estimate
Runner-up · Joe Biden, 2020 · 85.2%
Republican
William McKinley1896
48.8%
1,987 votes · R+10.6 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 47.7%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
16,358votes
85.2% of the vote · D+73.3 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 15,131 votes
Republican
Dwight D. Eisenhower1956
6,221votes
36.3% of the vote · D+26.7 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · 6,181 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
George McGovern1972
+72.7pts D vs U.S.
Place D+49.6 · U.S. R+23.2 · modeled estimate
Runner-up · Joe Biden, 2020 · +68.8 pts
Republican
William McKinley1896
+4.6pts R vs U.S.
Place R+10.6 · U.S. R+6.1 · modeled estimate
Runner-up · William H. Taft, 1912 · −11.2 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 | 91.4%13,888 | 8.6%1,304 | 15,192 |
| 2020 | D | 95.3%15,377 | 4.7%760 | 16,137 |
The 17th Suffolk District posts presidential margins exceeding 60 points, placing it among the most reliably one-sided state legislative districts in the country. Its dense urban electorate in the Boston area drives turnout patterns that rarely fluctuate.
Across the recorded series it reached a Democratic high of 80.7 points in 1964 and a Republican high of 10.6 points in 1896. Between 2020 and 2024 the district moved 6.2 points toward the Republican candidate; the 2024 margin was 67.1 points.
A population of 45,427, a 58% non-Hispanic-white share, and a median household income of $86,368 describe the district. The district's voting pattern over the last decade is most similar to that of 18th Suffolk District and 25th Middlesex District.
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.
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 139th State House District. Akashic. https://akashic.app/sld-lower/25139/. Accessed May 20, 2026. License: CC BY 4.0.