- Lead
- 249
- Total
- 22,650
- vs nation
- D+0.4
Massachusetts 18th State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 2,105
- Total
- 21,753
- vs nation
- D+5.2
- Lead
- 2,279
- Total
- 20,598
- vs nation
- D+9.0
- Lead
- 4,297
- Total
- 19,251
- vs nation
- D+18.5
- Lead
- 4,876
- Total
- 19,589
- vs nation
- D+17.6
- Lead
- 5,591
- Total
- 18,775
- vs nation
- D+32.2
- Lead
- 6,191
- Total
- 17,078
- vs nation
- D+35.7
- Lead
- 6,735
- Total
- 15,933
- vs nation
- D+33.8
Key facts
- 2024 presidential margin
- R+1.1MIT Election Lab
- Population
- 42,1842024 5-year
- Population density
- 604 / sq mi2024 5-year · TIGER/Line
- Land area
- 69.8 sq miTIGER/Line
- Median household income
- $96,6852024 5-year
- White (non-Hispanic)
- 83.6%2024 5-year
- Black
- 2.8%2024 5-year
- Hispanic / Latino
- 4.7%2024 5-year
- Peak Democratic margin
- D+59.2 in 1964MIT Election Lab
- Peak Republican margin
- R+57.4 in 1896MIT Election Lab
- Most similar
- 5th Bristol District, MA · twin score 97.4
presidential history
Party record book
Massachusetts 18th 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
79.4%
12,024 votes · D+59.2 · modeled estimate
Runner-up · John F. Kennedy, 1960 · 67.7%
Republican
William McKinley1896
77.0%
1,706 votes · R+57.4 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 73.6%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
John Kerry2004
12,096votes
64.4% of the vote · D+29.8 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · 12,024 votes
Republican
Donald Trump2024
11,299votes
49.9% of the vote · R+1.1 · modeled estimate
Runner-up · Donald Trump, 2020 · 9,638 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
Hubert Humphrey1968
+36.7pts D vs U.S.
Place D+36.0 · U.S. R+0.7 · modeled estimate
Runner-up · Lyndon B. Johnson, 1964 · +36.6 pts
Republican
William McKinley1896
+51.3pts R vs U.S.
Place R+57.4 · U.S. R+6.1 · modeled estimate
Runner-up · William McKinley, 1900 · +25.0 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 | 81.0%12,552 | 19.0%2,953 | 15,505 |
| 2020 | D | 55.8%10,552 | 44.2%8,357 | 18,909 |
The 9th Bristol sits near the ideological center of a post-industrial coastal county, with a presidential margin of R+1.1 in 2024 that marks it as one of Massachusetts's more genuinely competitive state house districts.
Across the recorded series it reached a Democratic high of 59.2 points in 1964 and a Republican high of 57.4 points in 1896. Between 2020 and 2024 the district moved 10.8 points toward the Republican candidate; the 2024 margin was 1.1 points.
A population of 42,184, a 84% non-Hispanic-white share, and a median household income of $96,685 describe the district. The district's voting pattern over the last decade is most similar to that of 5th Bristol District and 8th Bristol 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 18th State House District. Akashic. https://akashic.app/sld-lower/25018/. Accessed May 20, 2026. License: CC BY 4.0.