- Lead
- 6,949
- Total
- 25,035
- vs nation
- D+29.2
Massachusetts 89th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 8,744
- Total
- 26,417
- vs nation
- D+28.6
- Lead
- 5,697
- Total
- 24,266
- vs nation
- D+21.4
- Lead
- 2,442
- Total
- 23,244
- vs nation
- D+6.7
- Lead
- 3,181
- Total
- 22,380
- vs nation
- D+6.9
- Lead
- 2,839
- Total
- 21,275
- vs nation
- D+15.8
- Lead
- 3,344
- Total
- 20,005
- vs nation
- D+16.2
- Lead
- 4,302
- Total
- 18,830
- vs nation
- D+14.3
Key facts
- 2024 presidential margin
- D+27.8MIT Election Lab
- Population
- 43,4232024 5-year
- Population density
- 3,984 / sq mi2024 5-year · TIGER/Line
- Land area
- 10.9 sq miTIGER/Line
- Median household income
- $152,5382024 5-year
- White (non-Hispanic)
- 78.1%2024 5-year
- Black
- 2.0%2024 5-year
- Hispanic / Latino
- 3.9%2024 5-year
- Peak Democratic margin
- D+39.6 in 1964MIT Election Lab
- Peak Republican margin
- R+61.6 in 1896MIT Election Lab
- Most similar
- 21st Middlesex District, MA · twin score 98.6
presidential history
Party record book
Massachusetts 89th 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
69.7%
11,926 votes · D+39.6 · modeled estimate
Runner-up · Joe Biden, 2020 · 65.4%
Republican
William McKinley1896
77.3%
2,197 votes · R+61.6 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 76.9%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
17,282votes
65.4% of the vote · D+33.1 · modeled estimate
Runner-up · Kamala Harris, 2024 · 15,625 votes
Republican
Dwight D. Eisenhower1956
13,086votes
68.9% of the vote · R+38.0 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 12,217 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
Kamala Harris2024
+29.2pts D vs U.S.
Place D+27.8 · U.S. R+1.5 · modeled estimate
Runner-up · Joe Biden, 2020 · +28.6 pts
Republican
William McKinley1896
+55.5pts R vs U.S.
Place R+61.6 · U.S. R+6.1 · modeled estimate
Runner-up · Alf Landon, 1936 · +42.5 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 | 100.0%16,455 | 0.0%0 | 16,455 |
| 2020 | D | 80.6%16,605 | 19.4%3,992 | 20,597 |
With a 2024 presidential margin of D+27.8, the 31st Middlesex sits well outside competitive territory, reflecting the dense, college-educated suburban electorate that has defined much of eastern Massachusetts for over a decade.
Across the recorded series it reached a Democratic high of 39.6 points in 1964 and a Republican high of 61.6 points in 1896. Between 2020 and 2024 the district moved 5.3 points toward the Republican candidate; the 2024 margin was 27.8 points.
A population of 43,423, a 78% non-Hispanic-white share, and a median household income of $152,538 describe the district. The district's voting pattern over the last decade is most similar to that of 21st Middlesex District and 8th 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 89th State House District. Akashic. https://akashic.app/sld-lower/25089/. Accessed May 20, 2026. License: CC BY 4.0.