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Massachusetts' 3rd Congressional District

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Massachusetts' 3rd Congressional District
Incumbent
Lori TrahanDemocratic
Assumed office: January 3, 2019

Massachusetts' 3rd Congressional District in the United States House of Representatives is represented by Lori Trahan (D).

As of the 2020 Census, Massachusetts representatives represented an average of 781,497 residents. After the 2010 Census, each member represented 728,849 residents.

Elections

See also: Massachusetts' 3rd Congressional District election, 2028


There are no official candidates yet for this election.


See also: Massachusetts' 3rd Congressional District election, 2026

Note: At this time, Ballotpedia is combining all declared candidates for this election into one list under a general election heading. As primary election dates are published, this information will be updated to separate general election candidates from primary candidates as appropriate.

General election

The general election will occur on November 3, 2026.

General election for U.S. House Massachusetts District 3

Incumbent Lori Trahan (D) is running in the general election for U.S. House Massachusetts District 3 on November 3, 2026.

Candidate
Image of Lori Trahan
Lori Trahan (D)

Incumbents are bolded and underlined.

Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
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See also: Massachusetts' 3rd Congressional District election, 2024

General election

General election for U.S. House Massachusetts District 3

Incumbent Lori Trahan (D) won election in the general election for U.S. House Massachusetts District 3 on November 5, 2024.

Candidate
%
Votes
✔
Image of Lori Trahan
Lori Trahan (D)
 
97.5
 
264,698
  Other/Write-in votes
 
2.5%
 
6,861

Incumbents are bolded and underlined. The results have been certified. Source

Total votes: 271,559
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

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Democratic primary

Democratic primary for U.S. House Massachusetts District 3

Incumbent Lori Trahan (D) advanced from the Democratic primary for U.S. House Massachusetts District 3 on September 3, 2024.

Candidate
%
Votes
✔
Image of Lori Trahan
Lori Trahan
 
99.4
 
54,612
  Other/Write-in votes
 
0.6%
 
357

Incumbents are bolded and underlined. The results have been certified. Source

Total votes: 54,969
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

Do you want a spreadsheet of this type of data? Contact our sales team.

Withdrawn or disqualified candidates

Republican primary

No candidates for U.S. House Massachusetts District 3 appeared on the ballot for the Republican primary scheduled for September 3, 2024.

Withdrawn or disqualified candidates

See also: Massachusetts' 3rd Congressional District election, 2022

General election

General election for U.S. House Massachusetts District 3

Incumbent Lori Trahan (D) defeated Dean Tran (R) in the general election for U.S. House Massachusetts District 3 on November 8, 2022.

Candidate
%
Votes
✔
Image of Lori Trahan
Lori Trahan (D)
 
63.5
 
154,496
Image of Dean Tran
Dean Tran (R)
 
36.4
 
88,585
  Other/Write-in votes
 
0.1%
 
220

Incumbents are bolded and underlined. The results have been certified. Source

Total votes: 243,301
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

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Democratic primary

Democratic primary for U.S. House Massachusetts District 3

Incumbent Lori Trahan (D) advanced from the Democratic primary for U.S. House Massachusetts District 3 on September 6, 2022.

Candidate
%
Votes
✔
Image of Lori Trahan
Lori Trahan
 
99.6
 
64,190
  Other/Write-in votes
 
0.4%
 
283

Incumbents are bolded and underlined. The results have been certified. Source

Total votes: 64,473
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

Do you want a spreadsheet of this type of data? Contact our sales team.

Withdrawn or disqualified candidates

Republican primary

Republican primary for U.S. House Massachusetts District 3

Dean Tran (R) advanced from the Republican primary for U.S. House Massachusetts District 3 on September 6, 2022.

Candidate
%
Votes
✔
Image of Dean Tran
Dean Tran
 
99.3
 
24,087
  Other/Write-in votes
 
0.7%
 
180

There were no incumbents in this race. The results have been certified. Source

Total votes: 24,267
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

Do you want a spreadsheet of this type of data? Contact our sales team.

See also: Massachusetts' 3rd Congressional District election, 2020

General election

General election for U.S. House Massachusetts District 3

Incumbent Lori Trahan (D) won election in the general election for U.S. House Massachusetts District 3 on November 3, 2020.

Candidate
%
Votes
✔
Image of Lori Trahan
Lori Trahan (D)
 
97.7
 
286,896
  Other/Write-in votes
 
2.3%
 
6,643

Incumbents are bolded and underlined. The results have been certified. Source

Total votes: 293,539
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

Do you want a spreadsheet of this type of data? Contact our sales team.

Democratic primary

Democratic primary for U.S. House Massachusetts District 3

Incumbent Lori Trahan (D) advanced from the Democratic primary for U.S. House Massachusetts District 3 on September 1, 2020.

Candidate
%
Votes
✔
Image of Lori Trahan
Lori Trahan
 
99.2
 
115,142
  Other/Write-in votes
 
0.8%
 
880

Incumbents are bolded and underlined. The results have been certified. Source

Total votes: 116,022
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

Do you want a spreadsheet of this type of data? Contact our sales team.

Republican primary

The Republican primary scheduled for September 1, 2020, was canceled.

See also: United States House of Representatives elections in Massachusetts, 2018

General election

General election for U.S. House Massachusetts District 3

Lori Trahan (D) defeated Rick Green (R) and Mike Mullen (Independent) in the general election for U.S. House Massachusetts District 3 on November 6, 2018.

Candidate
%
Votes
✔
Image of Lori Trahan
Lori Trahan (D)
 
62.0
 
173,175
Image of Rick Green
Rick Green (R)
 
33.5
 
93,445
Image of Mike Mullen
Mike Mullen (Independent)  Candidate Connection
 
4.5
 
12,572
  Other/Write-in votes
 
0.0%
 
135

There were no incumbents in this race. The results have been certified. Source

Total votes: 279,327
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

Do you want a spreadsheet of this type of data? Contact our sales team.

Democratic primary

Democratic primary for U.S. House Massachusetts District 3

The following candidates ran in the Democratic primary for U.S. House Massachusetts District 3 on September 4, 2018.

Candidate
%
Votes
✔
Image of Lori Trahan
Lori Trahan
 
21.7
 
18,580
Image of Dan Koh
Dan Koh
 
21.5
 
18,435
Image of Barbara L'Italien
Barbara L'Italien
 
15.2
 
13,018
Image of Juana Matias
Juana Matias
 
15.2
 
12,993
Image of Rufus Gifford
Rufus Gifford
 
15.0
 
12,873
Image of Alexandra Chandler
Alexandra Chandler
 
5.7
 
4,846
Image of Abhijit Das
Abhijit Das
 
1.7
 
1,492
Image of Jeff Ballinger
Jeff Ballinger
 
1.6
 
1,384
Image of Bopha Malone
Bopha Malone
 
1.6
 
1,365
Image of Leonard Golder
Leonard Golder
 
0.7
 
584

There were no incumbents in this race. The results have been certified. Source

Total votes: 85,570
(100% precincts reporting)
Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

Do you want a spreadsheet of this type of data? Contact our sales team.

Withdrawn or disqualified candidates

Republican primary

Republican primary for U.S. House Massachusetts District 3

Rick Green (R) advanced from the Republican primary for U.S. House Massachusetts District 3 on September 4, 2018.

Candidate
✔
Image of Rick Green
Rick Green

There were no incumbents in this race. The results have been certified. Source

Candidate Connection = candidate completed the Ballotpedia Candidate Connection survey.
If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey.

Do you want a spreadsheet of this type of data? Contact our sales team.

Withdrawn or disqualified candidates

Previous election results


District map

2023_01_03_ma_congressional_district_03.jpg

Redistricting

2020-2021

See also: Redistricting in Massachusetts after the 2020 census

Massachusetts Gov. Charlie Baker (R) signed the state’s new congressional maps into law on November 22, 2021. Both chambers of the legislature approved the new maps on November 17, 2021. The state House approved the plan by a vote of 151-8 with 127 Democrats, 23 Republicans, and one independent voting in favor and six Republicans and two Democrats voting against. The state Senate approved the new congressional maps 26-13, with 24 Democrats and two Republicans voting in favor and 12 Democrats and one Republican opposed. In the previous redistricting cycle, Massachusetts adopted its congressional map almost ten years ago to the day—on Nov. 21, 2011. This map took effect for Massachusetts’ 2022 congressional elections.

As Nik DeCosta-Klipa wrote at Boston.com after the legislature approved the maps, "unlike the partisan redistricting fights happening across much of the country, the map has been an argument among Democrats in reliably-blue Massachusetts. While the proposal does not dramatically alter the general contours of the state’s nine Democrat-held House districts...some of the tweaks around the edges have elicited vocal — to some, surprising — outcry."[11] State Sen. Will Brownsberger (D), chair of the Special Joint Committee on Redistricting, said that he was unhappy that some members objected to the new maps. He said, "It’s always my goal to assure that every single senator is satisfied with the results of the redistricting process."[11]

How does redistricting in Massachusetts work? In Massachusetts, congressional and state legislative district lines are drawn by the state legislature. The lines drawn by the state legislature are subject to veto by the governor.[12]

State statutes require that state legislative district boundaries be contiguous and "reasonably preserve counties, towns, and cities intact, where otherwise possible." There are no such requirements in place for congressional districts.[12]

2020

2019_05_02_ma_congressional_district_03.jpg

2024

2023_01_03_ma_congressional_district_03.jpg

2010-2011

This is the 3rd Congressional District of Massachusetts after the 2001 redistricting process.
See also: Redistricting in Massachusetts after the 2010 census

In 2011, the Massachusetts State Legislature re-drew the congressional districts based on updated population information from the 2010 census.

District analysis

See also: The Cook Political Report's Partisan Voter Index
See also: FiveThirtyEight's elasticity scores

2026

Heading into the 2026 elections, based on results from the 2024 and 2020 presidential elections, the Cook Partisan Voter Index for this district is D+11. This meant that in those two presidential elections, this district's results were 11 percentage points more Democratic than the national average. This made Massachusetts' 3rd the 122nd most Democratic district nationally.[13]

2024

Heading into the 2024 elections, based on results from the 2020 and 2016 presidential elections, the Cook Partisan Voter Index for this district was D+11. This meant that in those two presidential elections, this district's results were 11 percentage points more Democratic than the national average. This made Massachusetts' 3rd the 121st most Democratic district nationally.[14]

Daily Kos calculated what the results of the 2020 presidential election in this district would have been following redistricting. Joe Biden (D) would have defeated Donald Trump (R) 62.7%-35.3%.[15]

2022

Heading into the 2022 elections, based on results from the 2020 and 2016 presidential elections, the Cook Partisan Voter Index for this district was D+11. This meant that in those two presidential elections, this district's results were 11 percentage points more Democratic than the national average. This made Massachusetts' 3rd the 120th most Democratic district nationally.[16]

Daily Kos calculated what the results of the 2020 presidential election in this district would have been following redistricting. Joe Biden (D) would have received 62.7% of the vote in this district and Donald Trump (R) would have received 35.3%.[17]

2018

Heading into the 2018 elections, based on results from the 2016 and 2012 presidential elections, the Cook Partisan Voter Index for this district was D+9. This meant that in those two presidential elections, this district's results were 9 percentage points more Democratic than the national average. This made Massachusetts' 3rd Congressional District the 133rd most Democratic nationally.[18]

FiveThirtyEight's September 2018 elasticity score for states and congressional districts measured "how sensitive it is to changes in the national political environment." This district's elasticity score was 1.18. This means that for every 1 point the national political mood moved toward a party, the district was expected to move 1.18 points toward that party.[19]

See also

External links

Footnotes

  1. ↑ Massachusetts Secretary of State, "DEMOCRATIC CANDIDATES FOR NOMINATION," accessed June 15, 2016
  2. ↑ Massachusetts Secretary of State, "REPUBLICAN CANDIDATES FOR NOMINATION," accessed June 15, 2016
  3. ↑ Massachusetts Secretary of State, "Republican Primary Candidates," accessed June 5, 2014
  4. ↑ Politico, "2012 Election Map, Massachusetts"
  5. ↑ U.S. Congress House Clerk, "Statistics of the Congressional Election of November 2, 2010," accessed March 28, 2013
  6. ↑ U.S. Congress House Clerk, "Statistics of the Congressional Election of November 4, 2008," accessed March 28, 2013
  7. ↑ U.S. Congress House Clerk, "Statistics of the Congressional Election of November 7, 2006," accessed March 28, 2013
  8. ↑ U.S. Congress House Clerk, "Statistics of the Congressional Election of November 2, 2004," accessed March 28, 2013
  9. ↑ U.S. Congress House Clerk, "Statistics of the Congressional Election of November 5, 2002," accessed March 28, 2013
  10. ↑ U.S. Congress House Clerk, "Statistics of the Congressional Election of November 7, 2000," accessed March 28, 2013
  11. ↑ 11.0 11.1 Boston.com, "Following contentious debate, the new Massachusetts congressional map is in Charlie Baker’s hands," November 18, 2021
  12. ↑ 12.0 12.1 All About Redistricting, "Massachusetts," accessed May 4, 2015
  13. ↑ Cook Political Report, "2025 Cook PVI℠: District Map and List (119th Congress)," accessed July 1, 2025
  14. ↑ Cook Political Report, "The 2022 Cook Partisan Voting Index (Cook PVI℠)," accessed January 10, 2024
  15. ↑ Daily Kos, "Daily Kos Elections' 2020 presidential results by congressional district, for new and old districts," accessed September 15, 2022
  16. ↑ Cook Political Report, "The 2022 Cook Partisan Voting Index (Cook PVI℠)," accessed February 6, 2023
  17. ↑ Daily Kos, "Daily Kos Elections' 2020 presidential results by congressional district, for new and old districts," accessed September 15, 2022
  18. ↑ Cook Political Report, "Introducing the 2017 Cook Political Report Partisan Voter Index," April 7, 2017
  19. ↑ FiveThirtyEight, "Election Update: The Most (And Least) Elastic States And Districts," September 6, 2018


Massachusetts' current delegation to the United States Congress
Senators
Edward Markey (D)
Elizabeth Warren (D)
Representatives
District 1
District 2
District 3
District 4
District 5
District 6
District 7
District 8
District 9
Democratic Party (11)

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