Massachusetts's 4th Congressional District (MA-4)
Last updated · 5 sources
Jake Auchincloss, a Democrat, has represented the district since 2021.
The district includes parts of Bristol, Norfolk, Worcester, Middlesex, and Plymouth counties.
According to the Census Bureau's 2020–2024 American Community Survey 5-year estimates, the district has a population of 787,020, a median household income of $116,055, and a median age of 40.9. Of residents 25 and older, 49.9% hold a bachelor's degree or higher.
Representative

U.S. Representative for Massachusetts's 4th District · Democrat
2026 election
Auchincloss has filed with the FEC to run for this seat in 2026. 5 candidates for the seat have reported receipts to the FEC.
5 candidates have reported raising money for the 2026 MA-4 race to the FEC.
Election Day: Tuesday, November 3, 2026
| Candidate | Party | Raised | Cash on hand | Through |
|---|---|---|---|---|
| Jake Auchincloss (incumbent) | Democratic | $3,630,329 | $7,341,766 | Aug 12 |
| Jason Poulos | Democratic | $68,414 | $11,430 | Aug 12 |
| Thomas Stalcup | Republican | $26,242 | $1,319 | Aug 12 |
| Ihssane Leckey | Democratic | $24,997 | $2,816 | Jun 30 |
| Christopher Slater Boyd | Democratic | $2,945 | $1,935 | Mar 31 |
Includes primary candidates; FEC filings do not record primary results. FEC race page
District profile
- Population
- 787,020
- Median household income
- $116,055
- Median age
- 40.9
- Bachelor's degree or higher
- 49.9%
Census Bureau, 2020–2024 American Community Survey 5-year estimates
Massachusetts senators
Elizabeth WarrenU.S. Senator for Massachusetts · Democrat
Ed MarkeyU.S. Senator for Massachusetts · Democrat
Neighboring districts
Sources
- District boundaries (Census Bureau cartographic boundary file, 119th Congress) · retrieved Oct 2, 2026
- Counties by district (Census Bureau relationship file) · retrieved Oct 2, 2026
- District profile (Census Bureau, 2020–2024 American Community Survey 5-year estimates) · retrieved Oct 2, 2026
- congress-legislators (member data, CC0) · retrieved Oct 2, 2026
- Candidates and totals (Federal Election Commission) · retrieved Oct 2, 2026