- Lead
- 40,486
- Total
- 99,043
- vs nation
- D+42.3
Massachusetts Middlesex and Worcester District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 47,012
- Total
- 103,557
- vs nation
- D+40.9
- Lead
- 33,193
- Total
- 95,566
- vs nation
- D+32.6
- Lead
- 22,517
- Total
- 87,124
- vs nation
- D+22.0
- Lead
- 24,860
- Total
- 85,198
- vs nation
- D+21.9
- Lead
- 23,139
- Total
- 80,486
- vs nation
- D+31.2
- Lead
- 23,472
- Total
- 77,518
- vs nation
- D+29.8
- Lead
- 26,322
- Total
- 74,290
- vs nation
- D+26.9
Key facts
- 2024 presidential margin
- D+40.9MIT Election Lab
- Population
- 178,1302024 5-year
- Population density
- 936 / sq mi2024 5-year · TIGER/Line
- Land area
- 190 sq miTIGER/Line
- Median household income
- $138,1592024 5-year
- White (non-Hispanic)
- 72.2%2024 5-year
- Black
- 2.3%2024 5-year
- Hispanic / Latino
- 7.2%2024 5-year
- Peak Democratic margin
- D+53.6 in 1964MIT Election Lab
- Peak Republican margin
- R+50.0 in 1896MIT Election Lab
- Most similar
- Third Middlesex District, MA · twin score 99.4
presidential history
Party record book
Massachusetts Middlesex and Worcester 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
76.6%
51,587 votes · D+53.6 · modeled estimate
Runner-up · Joe Biden, 2020 · 71.4%
Republican
William McKinley1896
69.8%
6,748 votes · R+50.0 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 69.0%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
73,898votes
71.4% of the vote · D+45.4 · modeled estimate
Runner-up · Kamala Harris, 2024 · 68,276 votes
Republican
Dwight D. Eisenhower1956
39,594votes
60.6% of the vote · R+21.5 · modeled estimate
Runner-up · Ronald Reagan, 1984 · 37,034 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
+42.3pts D vs U.S.
Place D+40.9 · U.S. R+1.5 · modeled estimate
Runner-up · Joe Biden, 2020 · +40.9 pts
Republican
William McKinley1896
+43.9pts R vs U.S.
Place R+50.0 · U.S. R+6.1 · modeled estimate
Runner-up · Alf Landon, 1936 · +24.3 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 | 100.0%66,227 | 0.0%0 | 66,227 |
| 2020 | D | 79.5%66,936 | 20.5%17,236 | 84,172 |
Spanning suburban and urban communities northwest of Boston, this district delivered a 40.9-point Democratic presidential margin in 2024, reflecting a highly educated, density-friendly electorate typical of the inner Route 128 corridor.
Across the recorded series it reached a Democratic high of 53.6 points in 1964 and a Republican high of 50.0 points in 1896. Between 2020 and 2024 the district moved 4.5 points toward the Republican candidate; the 2024 margin was 40.9 points.
A population of 178,130, a 72% non-Hispanic-white share, and a median household income of $138,159 describe the district. The district's voting pattern over the last decade is most similar to that of Third Middlesex District and Middlesex and Norfolk District.
The state-senate 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 Middlesex and Worcester District. Akashic. https://akashic.app/sld-upper/25D12/. Accessed May 20, 2026. License: CC BY 4.0.