Federal officeholders only. State and local officeholders are planned for the next data pass.
2026 election
On the ballot
MA-03 · U.S. House
DDemocrat Lori Trahan holds the seat and is contesting it.
Primary September 1, 2026.
How the seat has run
Year
U.S. House
President
Ran ahead
2024
D+73.0Lori Trahan
D+18.9
+54.1
2022
D+26.2Lori Trahan
—
—
2020
D+97.7Lori Trahan
D+27.3
—
2018
D+28.5Lori Loureiro Trahan
—
—
“Ran ahead” is how far the winning party’s House candidate ran ahead of that party’s presidential margin in the same district. A dash means the House race and the presidential figure were measured on different district lines, so the two cannot be subtracted — both are still shown unchanged.
U.S. House elections · 25 House
Senate and governor results are in the Office selector at the top of this page.
U.S. House
Each result reflects the U.S. House district as it was drawn for that election; redistricting has redrawn these lines over time, so they can differ from the current 120th-Congress district shown on the map above.
Source · MIT Election Lab (MEDSL), House. CC BY 4.0.
Year
District
Won
Democratic
Republican
Total
2024
3
D
73.0%264,698
0.0%0
362,678
2022
3
D
61.5%154,496
35.2%88,585
251,389
2020
3
D
97.7%286,896
0.0%0
293,539
2018
3
D
62.0%173,175
33.5%93,445
279,327
2016
3
D
68.7%236,713
31.2%107,519
344,592
2014
3
D
63.0%139,104
36.9%81,638
220,946
2012
3
D
65.9%212,119
34.0%109,372
321,753
2010
3
D
56.5%122,708
39.2%85,124
217,352
2008
3
D
98.5%227,619
0.0%0
231,107
2006
3
D
98.8%166,973
0.0%0
168,956
2004
3
D
70.5%192,036
29.4%80,197
272,412
2002
3
D
98.8%155,697
0.0%0
157,545
2000
3
D
98.8%213,065
0.0%0
215,561
1998
3
D
56.9%108,613
41.5%79,174
190,878
1996
3
D
52.9%135,044
45.4%115,694
255,097
1994
3
R
44.2%93,689
54.6%115,810
212,035
1992
3
R
44.3%115,587
50.4%131,473
260,932
1990
3
D
65.5%150,992
0.0%0
230,432
1988
3
D
99.8%191,005
0.0%0
191,383
1986
3
D
75.0%120,222
0.0%0
160,202
1984
3
D
67.4%148,461
32.6%71,765
220,254
1982
3
D
99.9%142,611
0.0%0
142,740
1980
3
D
72.3%141,560
27.7%54,213
195,783
1978
3
D
75.2%119,337
24.7%39,259
158,730
1976
3
D
100.0%168,520
0.0%0
168,568
Massachusetts 3rd Congressional District sits in New England. In 2024 it voted Democratic.
Across the recorded series it reached a Democratic high of 44.8 points in 1964 and a Republican high of 56.2 points in 1896. Between 2020 and 2024 the district moved 8.4 points toward the Republican candidate; the 2024 margin was 18.9 points.
A population of 781,168, a 61% non-Hispanic-white share, and a median household income of $99,663 describe the district. The district's voting pattern over the last decade is most similar to that of Congressional District 8 and Congressional District 4.
Akashic
Political twins — districts
The congressional 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.
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons → · Or open the source-auditable district brief for electoral baseline, electorate, current-cycle coverage, geography, official dates, and methodology. Open campaign intelligence report →
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All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Massachusetts 3rd Congressional District. Akashic. https://akashic.app/cd/2503/. Accessed May 20, 2026. License: CC BY 4.0.
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How did Massachusetts 3rd Congressional District vote in 2024?
In 2024, Massachusetts 3rd Congressional District voted Democratic by 18.9 points (D+18.9), carried by the Democratic candidate. Out of 359,201 votes cast, 208,643 went Democratic and 140,867 went Republican.
When did Massachusetts 3rd Congressional District last vote Republican?
The most recent presidential election in which Massachusetts 3rd Congressional District voted Republican was 1988.
How many people live in Massachusetts 3rd Congressional District?
Massachusetts 3rd Congressional District has a population of 781,168 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Massachusetts 3rd Congressional District?
Median household income in Massachusetts 3rd Congressional District is $99,663 — above the national median of $80,734. The Massachusetts state median is $103,960.
What is the political history of Massachusetts 3rd Congressional District?
Akashic tracks 38 presidential elections in Massachusetts 3rd Congressional District from 1876 to 2024. Of those, 14 went Democratic and 23 went Republican.