- Lead
- 15,191
- Total
- 20,540
- vs nation
- D+75.4
Massachusetts 84th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 17,529
- Total
- 21,787
- vs nation
- D+76.0
- Lead
- 15,567
- Total
- 20,504
- vs nation
- D+73.8
- Lead
- 13,459
- Total
- 17,883
- vs nation
- D+71.4
- Lead
- 13,545
- Total
- 17,658
- vs nation
- D+69.4
- Lead
- 12,804
- Total
- 16,694
- vs nation
- D+79.2
- Lead
- 11,861
- Total
- 16,167
- vs nation
- D+72.8
- Lead
- 11,875
- Total
- 15,931
- vs nation
- D+66.2
Key facts
- 2024 presidential margin
- D+74.0MIT Election Lab
- Population
- 46,0242024 5-year
- Population density
- 18,410 / sq mi2024 5-year · TIGER/Line
- Land area
- 2.5 sq miTIGER/Line
- Median household income
- $125,5872024 5-year
- White (non-Hispanic)
- 52.6%2024 5-year
- Black
- 10.6%2024 5-year
- Hispanic / Latino
- 12.9%2024 5-year
- Peak Democratic margin
- D+86.2 in 1964MIT Election Lab
- Most similar
- 25th Middlesex District, MA · twin score 99.2
presidential history
Party record book
Massachusetts 84th 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
92.9%
14,597 votes · D+86.2 · modeled estimate
Runner-up · Joe Biden, 2020 · 89.3%
Republican
William McKinley1896
40.4%
474 votes · D+6.2 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 35.5%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
19,452votes
89.3% of the vote · D+80.5 · modeled estimate
Runner-up · Kamala Harris, 2024 · 17,473 votes
Republican
Dwight D. Eisenhower1956
2,688votes
27.1% of the vote · D+45.4 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 2,474 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
+92.0pts D vs U.S.
Place D+68.8 · U.S. R+23.2 · modeled estimate
Runner-up · Walter Mondale, 1984 · +80.7 pts
Republican
William McKinley1896
−12.3pts R vs U.S.
Place D+6.2 · U.S. R+6.1 · modeled estimate
Runner-up · William H. Taft, 1912 · −25.9 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 | 100.0%17,440 | 0.0%0 | 17,440 |
| 2020 | D | 80.6%17,600 | 19.4%4,231 | 21,831 |
The 26th Middlesex posted a 2024 presidential margin exceeding 72 points Democratic, placing it among the most one-sided state house districts in the commonwealth and reflecting a dense, highly educated urban core.
Across the recorded series it reached a Democratic high of 86.2 points in 1964. Between 2020 and 2024 the district moved 6.5 points toward the Republican candidate; the 2024 margin was 74.0 points.
A population of 46,024, a 53% non-Hispanic-white share, and a median household income of $125,587 describe the district. The district's voting pattern over the last decade is most similar to that of 25th Middlesex District and 34th 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 84th State House District. Akashic. https://akashic.app/sld-lower/25084/. Accessed May 20, 2026. License: CC BY 4.0.