Massachusetts’s 6th Congressional District is represented by Seth Moulton (D) in the U.S. House of Representatives. The district is one of Massachusetts’s seats in the 435-member House of Representatives. After the 2020 Census, the average congressional district had 761,169 people, according to the U.S. Census Bureau, and these district boundaries were drawn during the redistricting cycle that followed.
Congressional representatives serve two-year terms and face election every even-numbered year. The next election for this seat will take place on November 3, 2026.
Population
778,172
Median Household Income
$115,872
Population and income: U.S. Census Bureau, American Community Survey 5-year estimates for 2019 to 2023, for district lines in effect on January 1, 2023.
Partisan Lean
D+21
2024 presidential margin (Trump vs Harris). Source: The Downballot.
District boundary, 119th Congress. Boundary data: U.S. Census Bureau TIGERweb. Map tiles: OpenStreetMap.
Seth Moulton and Massachusetts's 6th Congressional District
Seth Moulton, a member of the Democratic Party, represents Massachusetts's 6th Congressional District and has held the seat since January 6, 2015. The boundary map for the district is above and the ZIP codes it covers are listed further down this page.
Committee assignments: House Committee on Transportation and Infrastructure, House Committee on Armed Services and House Select Committee on the Strategic Competition Between the United States and the Chinese Communist Party.
The current term ends January 3, 2027. The seat is on the ballot on Tuesday, November 3, 2026. Washington office phone: 202-225-8020. Official site: moulton.house.gov.
Current Representative
Rep. Seth Moulton (D)
119th Congress • Democrat • Representing this district since January 6, 2015
Seth Moulton currently represents Massachusetts’s 6th Congressional District as a member of the Democratic Party in the United States House of Representatives. The representative’s district office helps constituents with federal casework, such as Social Security claims and veterans’ benefits.
2026 Election
On the ballot November 3, 2026
- Micah Quinney Jones, Republican
- Dan Koh, Democratic
Source: Massachusetts Secretary of the Commonwealth, 2026 state election candidates, checked September 26, 2026. Write-in candidates are not listed.
Key dates for November 3, 2026
| Register by mail | Saturday, October 24 Application must be postmarked by this date. |
|---|---|
| Register online | Saturday, October 24 |
| Register in person | Saturday, October 24 |
| Early in-person voting | October 17 to October 30 |
| Request a mail ballot | Tuesday, October 27 Application must reach your local election office by 5 p.m. on October 27. |
| Return a mail ballot | Postmarked by November 3 and received by 5 p.m. on November 6, or dropped off by 8 p.m. on November 3. |
| Election Day | Tuesday, November 3, 2026 |
Check your registration with the Massachusetts voter lookup. Dates come from the Massachusetts election office and were checked September 26, 2026. States can change deadlines, so confirm with your election office before you act.
Polling places in Massachusetts are open 7 a.m. to 8 p.m., local time. Confirm your registration and polling place on the official federal voter page for Massachusetts: vote.gov.
What is on the ballot nationally on November 3, 2026
Contact Your Representative
Washington Office
1126 Longworth House Office Building
Washington, DC 20515
Phone: (202) 225-8020
Online
Committee Assignments
- House Committee on Transportation and Infrastructure
- House Committee on Armed Services
- House Select Committee on the Strategic Competition Between the United States and the Chinese Communist Party
About This District
The district covers all of Essex County and parts of Middlesex County in Massachusetts. Its largest cities are Lynn (about 101,000), Peabody (about 54,000), Salem (about 44,000), and Beverly (about 43,000).
Learn more about congressional districts
- What is a congressional district?
- What does a U.S. Representative do?
- What is gerrymandering?
- How congressional redistricting works
Frequently Asked Questions
Who represents Massachusetts's 6th Congressional District?
Seth Moulton (D) represents Massachusetts's 6th Congressional District in the U.S. House of Representatives.
What political party is Seth Moulton a member of?
Seth Moulton is a member of the Democratic Party.
How can I contact Seth Moulton?
You can reach Seth Moulton by phone at 202-225-8020 or through their official website at https://moulton.house.gov.
When does Seth Moulton's current term end?
Seth Moulton's current term in the U.S. House of Representatives ends on January 3, 2027.
Where is Massachusetts's 6th Congressional District?
Massachusetts's 6th Congressional District is located in the state of Massachusetts and is one of the 435 voting congressional districts in the U.S. House of Representatives.
What district does Seth Moulton represent?
Seth Moulton has represented Massachusetts's 6th Congressional District since January 6, 2015. The boundary map for the district is on this page.
Where can I see a map of Seth Moulton's district?
The boundary map for Massachusetts's 6th Congressional District is on this page. It is drawn from U.S. Census Bureau TIGERweb boundary files for the 119th Congress.
What committees is Seth Moulton on?
Seth Moulton sits on House Committee on Transportation and Infrastructure, House Committee on Armed Services and House Select Committee on the Strategic Competition Between the United States and the Chinese Communist Party. Committee assignments come from the Clerk of the House MemberData file.
Is Seth Moulton still in Congress?
This site shows Seth Moulton holding Massachusetts's 6th Congressional District, checked against the Clerk of the House member list. All 435 House seats are on the ballot on November 3, 2026, so the answer can change with that election.
Nearby Districts in Massachusetts
ZIP Codes in Massachusetts's 6th Congressional District
This congressional district contains 50 ZIP codes. The most common 10 are shown below; expand the full list to see every ZIP in the district.
8 of these ZIP codes also extend into another Massachusetts district, so a ZIP code here does not always identify a single representative. They are 01730 (also in the 5th), 01731 (also in the 3rd and 5th), 01801 (also in the 5th), 01821 (also in the 3rd and 5th), 01852 (also in the 3rd), 01862 (also in the 3rd), 01876 (also in the 3rd), 02420 (also in the 5th).
- 01730
- 01731
- 01801
- 01803
- 01810
- 01821
- 01833
- 01834
- 01845
- 01852
View all 50 ZIP codes in this district
- 01730
- 01731
- 01801
- 01803
- 01810
- 01821
- 01833
- 01834
- 01845
- 01852
- 01860
- 01862
- 01864
- 01867
- 01876
- 01880
- 01887
- 01901
- 01902
- 01904
- 01905
- 01906
- 01907
- 01908
- 01913
- 01915
- 01921
- 01922
- 01923
- 01929
- 01930
- 01937
- 01938
- 01940
- 01944
- 01945
- 01949
- 01950
- 01951
- 01952
- 01960
- 01965
- 01966
- 01969
- 01970
- 01982
- 01983
- 01984
- 01985
- 02420
ZIP-to-district boundaries sourced from the U.S. Census Bureau's 2024-07-30 Block Equivalency File for the 119th Congress. ZCTAs (ZIP Code Tabulation Areas) approximate USPS delivery ZIPs.
U.S. Senators for this state: Edward J. Markey (D), Elizabeth Warren (D)
Local surveillance camera contracts
Automated license plate reader contracts are approved locally, by city councils and county boards, not by Congress. These places in this district have a contract record documented from public sources:
Records compiled by Who Approved This, an independent public-records project. Approval dates, amounts, and end dates are cited to council agendas, minutes, and signed contracts.
Place list rebuilt from the Who Approved This public export on September 26, 2026.
Last updated September 27, 2026.
Data last checked September 26, 2026.
See how this district compares with another using Compare Districts.