- Lead
- 33,215
- Total
- 59,581
- vs nation
- D+57.2
Massachusetts Middlesex and Suffolk District
President margin by year
Place winner margin
President results by year
Modeled candidate-vote estimate on current district boundaries
- Lead
- 45,361
- Total
- 67,925
- vs nation
- D+62.3
- Lead
- 41,290
- Total
- 64,830
- vs nation
- D+61.6
- Lead
- 34,184
- Total
- 57,954
- vs nation
- D+55.1
- Lead
- 33,949
- Total
- 56,467
- vs nation
- D+52.8
- Lead
- 31,226
- Total
- 52,627
- vs nation
- D+61.8
- Lead
- 28,780
- Total
- 49,522
- vs nation
- D+57.6
- Lead
- 28,940
- Total
- 47,581
- vs nation
- D+52.3
Key facts
- 2024 presidential margin
- D+55.7MIT Election Lab
- Population
- 183,6562024 5-year
- Population density
- 18,184 / sq mi2024 5-year · TIGER/Line
- Land area
- 10.1 sq miTIGER/Line
- Median household income
- $103,7122024 5-year
- White (non-Hispanic)
- 42.5%2024 5-year
- Black
- 9.6%2024 5-year
- Hispanic / Latino
- 27.5%2024 5-year
- Peak Democratic margin
- D+74.7 in 1964MIT Election Lab
- Peak Republican margin
- R+29.4 in 1896MIT Election Lab
- Most similar
- First Suffolk District, MA · twin score 96.6
presidential history
Party record book
Massachusetts Middlesex and Suffolk 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
87.2%
45,933 votes · D+74.7 · modeled estimate
Runner-up · Joe Biden, 2020 · 82.5%
Republican
William McKinley1896
60.5%
5,505 votes · R+29.4 · modeled estimate
Runner-up · Warren G. Harding, 1920 · 56.7%
Most votes
Largest number of votes cast for the party’s presidential nominee here.
Democratic
Joe Biden2020
56,020votes
82.5% of the vote · D+66.8 · modeled estimate
Runner-up · Hillary Clinton, 2016 · 50,884 votes
Republican
Dwight D. Eisenhower1956
21,191votes
44.3% of the vote · D+11.0 · modeled estimate
Runner-up · Dwight D. Eisenhower, 1952 · 20,363 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
George McGovern1972
+66.2pts D vs U.S.
Place D+43.1 · U.S. R+23.2 · modeled estimate
Runner-up · Joe Biden, 2020 · +62.3 pts
Republican
William McKinley1896
+23.4pts R vs U.S.
Place R+29.4 · U.S. R+6.1 · modeled estimate
Runner-up · William H. Taft, 1912 · −5.1 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 | 97.9%64,893 | 2.1%1,395 | 66,288 |
Anchored in Cambridge and Somerville, this district's D+55.7 presidential margin reflects a dense concentration of university communities, young renters, and highly educated professionals that consistently produces some of the largest Democratic margins in Massachusetts.
Across the recorded series it reached a Democratic high of 74.7 points in 1964 and a Republican high of 29.4 points in 1896. Between 2020 and 2024 the district moved 11.0 points toward the Republican candidate; the 2024 margin was 55.7 points.
A population of 183,656, a 43% non-Hispanic-white share, and a median household income of $103,712 describe the district. The district's voting pattern over the last decade is most similar to that of First Suffolk District and Third Suffolk 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 Suffolk District. Akashic. https://akashic.app/sld-upper/25D26/. Accessed May 20, 2026. License: CC BY 4.0.