- Lead
- 1,723
- Total
- 23,361
- vs nation
- D+8.8
Massachusetts 100th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 4,532
- Total
- 24,979
- vs nation
- D+13.7
- Lead
- 2,325
- Total
- 23,613
- vs nation
- D+7.8
- Lead
- 827
- Total
- 22,718
- vs nation
- R+7.5
- Lead
- 198
- Total
- 22,285
- vs nation
- R+8.2
- Lead
- 440
- Total
- 21,286
- vs nation
- D+4.5
- Lead
- 1,555
- Total
- 20,075
- vs nation
- D+7.2
- Lead
- 2,255
- Total
- 18,825
- vs nation
- D+3.5
Key facts
- 2024 presidential margin
- D+7.4MIT Election Lab
- Population
- 44,8992024 5-year
- Population density
- 2,595 / sq mi2024 5-year · TIGER/Line
- Land area
- 17.3 sq miTIGER/Line
- Median household income
- $123,7182024 5-year
- White (non-Hispanic)
- 69.6%2024 5-year
- Black
- 4.7%2024 5-year
- Hispanic / Latino
- 5.0%2024 5-year
- Peak Democratic margin
- D+29.0 in 1964MIT Election Lab
- Peak Republican margin
- R+69.9 in 1896MIT Election Lab
- Most similar
- 3rd Norfolk District, MA · twin score 94.5
presidential history
Party record book
Massachusetts 100th 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
64.3%
10,040 votes · D+29.0 · modeled estimate
Runner-up · Joe Biden, 2020 · 58.1%
Republican
Warren G. Harding1920
81.5%
4,170 votes · R+64.9 · modeled estimate
Runner-up · William McKinley, 1896 · 81.3%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
14,502votes
58.1% of the vote · D+18.1 · modeled estimate
Runner-up · Kamala Harris, 2024 · 12,202 votes
Republican
Ronald Reagan1984
12,893votes
63.2% of the vote · R+26.7 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1956 · 12,260 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
+13.7pts D vs U.S.
Place D+18.1 · U.S. D+4.5 · modeled estimate
Runner-up · George McGovern, 1972 · +9.0 pts
Republican
William McKinley1896
+63.8pts R vs U.S.
Place R+69.9 · U.S. R+6.1 · modeled estimate
Runner-up · Alf Landon, 1936 · +58.7 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%16,572 | 18.6%3,799 | 20,371 |
| 2020 | D | 83.7%17,201 | 16.3%3,346 | 20,547 |
Covering part of Norfolk County south of Boston, the 5th Norfolk district posted a D+7.4 presidential margin in 2024 — notably tighter than Massachusetts as a whole, signaling a competitive suburban corridor worth watching in state-level races.
Across the recorded series it reached a Democratic high of 29.0 points in 1964 and a Republican high of 69.9 points in 1896. Between 2020 and 2024 the district moved 10.8 points toward the Republican candidate; the 2024 margin was 7.4 points.
A population of 44,899, a 70% non-Hispanic-white share, and a median household income of $123,718 describe the district. The district's voting pattern over the last decade is most similar to that of 3rd Norfolk District and State House District 53.
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 100th State House District. Akashic. https://akashic.app/sld-lower/25100/. Accessed May 20, 2026. License: CC BY 4.0.