- Lead
- 5,080
- Total
- 26,307
- vs nation
- D+20.8
Massachusetts 105th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 6,823
- Total
- 26,797
- vs nation
- D+21.0
- Lead
- 3,426
- Total
- 24,584
- vs nation
- D+11.8
- Lead
- 324
- Total
- 22,945
- vs nation
- R+2.4
- Lead
- 920
- Total
- 22,571
- vs nation
- R+3.2
- Lead
- 1,538
- Total
- 21,547
- vs nation
- D+9.6
- Lead
- 2,511
- Total
- 20,702
- vs nation
- D+11.6
- Lead
- 3,116
- Total
- 19,710
- vs nation
- D+7.3
Key facts
- 2024 presidential margin
- D+19.3MIT Election Lab
- Population
- 43,3282024 5-year
- Population density
- 1,252 / sq mi2024 5-year · TIGER/Line
- Land area
- 34.6 sq miTIGER/Line
- Median household income
- $148,1222024 5-year
- White (non-Hispanic)
- 85.9%2024 5-year
- Black
- 1.7%2024 5-year
- Hispanic / Latino
- 3.6%2024 5-year
- Peak Democratic margin
- D+33.4 in 1964MIT Election Lab
- Peak Republican margin
- R+64.2 in 1896MIT Election Lab
- Most similar
- 9th Norfolk District, MA · twin score 98.4
presidential history
Party record book
Massachusetts 105th 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
66.4%
10,614 votes · D+33.4 · modeled estimate
Runner-up · Joe Biden, 2020 · 61.4%
Republican
Warren G. Harding1920
79.2%
3,971 votes · R+61.5 · modeled estimate
Runner-up · William McKinley, 1896 · 76.7%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
16,449votes
61.4% of the vote · D+25.5 · modeled estimate
Runner-up · Kamala Harris, 2024 · 15,374 votes
Republican
Ronald Reagan1984
12,319votes
60.8% of the vote · R+22.0 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1956 · 11,741 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
+21.0pts D vs U.S.
Place D+25.5 · U.S. D+4.5 · modeled estimate
Runner-up · Kamala Harris, 2024 · +20.8 pts
Republican
William McKinley1896
+58.1pts R vs U.S.
Place R+64.2 · U.S. R+6.1 · modeled estimate
Runner-up · Alf Landon, 1936 · +53.7 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 | 81.4%15,992 | 18.6%3,666 | 19,658 |
| 2020 | D | 83.7%16,599 | 16.3%3,229 | 19,828 |
Anchored in Norfolk County's inner suburbs south of Boston, the 10th Norfolk District delivered a D+19 margin in 2024, reflecting the broader realignment of college-educated suburban voters that has reshaped Massachusetts statehouse races.
Across the recorded series it reached a Democratic high of 33.4 points in 1964 and a Republican high of 64.2 points in 1896. Between 2020 and 2024 the district moved 6.2 points toward the Republican candidate; the 2024 margin was 19.3 points.
A population of 43,328, a 86% non-Hispanic-white share, and a median household income of $148,122 describe the district. The district's voting pattern over the last decade is most similar to that of 9th Norfolk District and 11th Norfolk 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 105th State House District. Akashic. https://akashic.app/sld-lower/25105/. Accessed May 20, 2026. License: CC BY 4.0.