- Lead
- 5,696
- Total
- 14,024
- vs nation
- D+42.1
Massachusetts 123rd State House District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 7,943
- Total
- 14,834
- vs nation
- D+49.1
- Lead
- 6,292
- Total
- 12,848
- vs nation
- D+46.9
- Lead
- 4,828
- Total
- 11,666
- vs nation
- D+37.5
- Lead
- 4,471
- Total
- 11,103
- vs nation
- D+33.0
- Lead
- 3,680
- Total
- 10,045
- vs nation
- D+39.1
- Lead
- 3,258
- Total
- 8,971
- vs nation
- D+35.8
- Lead
- 3,182
- Total
- 8,211
- vs nation
- D+30.2
Key facts
- 2024 presidential margin
- D+40.6MIT Election Lab
- Population
- 42,4952024 5-year
- Population density
- 9,041 / sq mi2024 5-year · TIGER/Line
- Land area
- 4.7 sq miTIGER/Line
- Median household income
- $90,1062024 5-year
- White (non-Hispanic)
- 36.2%2024 5-year
- Black
- 3.6%2024 5-year
- Hispanic / Latino
- 50.8%2024 5-year
- Peak Democratic margin
- D+61.7 in 1964MIT Election Lab
- Peak Republican margin
- R+44.5 in 1896MIT Election Lab
- Most similar
- 11th Suffolk District, MA · twin score 95.3
presidential history
Party record book
Massachusetts 123rd 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
80.7%
9,550 votes · D+61.7 · modeled estimate
Runner-up · Joe Biden, 2020 · 75.8%
Republican
William McKinley1896
68.4%
3,023 votes · R+44.5 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 67.3%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
11,243votes
75.8% of the vote · D+53.5 · modeled estimate
Runner-up · Harry S. Truman, 1948 · 9,859 votes
Republican
Dwight D. Eisenhower1956
9,150votes
56.0% of the vote · R+12.5 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · 9,114 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
+49.1pts D vs U.S.
Place D+53.5 · U.S. D+4.5 · modeled estimate
Runner-up · Hillary Clinton, 2016 · +46.9 pts
Republican
William McKinley1896
+38.4pts R vs U.S.
Place R+44.5 · U.S. R+6.1 · modeled estimate
Runner-up · Warren G. Harding, 1920 · +13.3 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 | 92.7%12,740 | 7.3%998 | 13,738 |
| 2020 | D | 96.7%14,208 | 3.3%482 | 14,690 |
Anchored in dense Boston neighborhoods, the 1st Suffolk regularly posts presidential margins above 40 points, reflecting a heavily urban, majority-minority electorate that has made it among the most reliably one-sided districts in the Massachusetts House.
Across the recorded series it reached a Democratic high of 61.7 points in 1964 and a Republican high of 44.5 points in 1896. Between 2020 and 2024 the district moved 12.9 points toward the Republican candidate; the 2024 margin was 40.6 points.
A population of 42,495, a 36% non-Hispanic-white share, and a median household income of $90,106 describe the district. The district's voting pattern over the last decade is most similar to that of 11th Suffolk District and 6th 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 123rd State House District. Akashic. https://akashic.app/sld-lower/25123/. Accessed May 20, 2026. License: CC BY 4.0.