Congressional district · Boundaries of the 119th Congress
Massachusetts's 4th district
Massachusetts's 4th district has 788,972 residents on 672 mi² of land. It is represented by Jake Auchincloss (D-MA-4). Federal contract obligations attributed to it reached $133.6M in FY2026.
- Residents
- 788,972
- Land area
- 672 mi²
- Counties
- 5
- Representative
- Jake Auchincloss
Members for this district
Members who held this seat while these boundaries were in force, newest first.
Senators
The state's senators today, or on the last day of these boundaries for an older plan.
Elizabeth WarrenD-MA
Edward J. MarkeyD-MA
Counties
Share of the district's residents living in each county, and share of the county's residents living in the district (2020 census tracts weighted by their overlap).
- Bristol County47% of the district · 64% of the county
- Norfolk County32% of the district · 35% of the county
- Middlesex County12% of the district · 5.7% of the county
- Worcester County7.0% of the district · 6.4% of the county
- Plymouth County1.5% of the district · 2.2% of the county
Federal contracts
Contract obligations attributed to the district by each action's county and its award's ZIP code (land shares through census tracts); an estimate where ZIP codes cross district lines.
- Obligations · FY2026
- $133.6M
- Per resident
- $169
- Rank in Massachusetts
- 9 of 9
- Contract actions
- 25.4K
- New awards: 23.3K
By fiscal year
- 659.9MFY2017
- 878.9MFY2018
- 1.1BFY2019
- 994.6MFY2020
- 885.8MFY2021
- 621.3MFY2022
- 589.6MFY2023
- 159.8MFY2024
- 122.3MFY2025
- 133.6MFY2026
Top buyers
- Department of the Navy$61.4M46%Department of Defense
- Department of the Air Force$20.4M15%Department of Defense
- Department of the Army$19.9M15%Department of Defense
- Defense Logistics Agency$9.6M7.2%Department of Defense
- United States Mint$5.6M4.2%Department of the Treasury
- Environmental Protection Agency$3.2M2.4%
- Department of Veterans Affairs$2.5M1.9%
- Department of Justice
Top recipients
- 1 award
- 95 awards
- 1 award
- LEACHGARNER, INC.$5.2M3.9%9 awards
- CHARTER CONTRACTING COMPANY, LLC$4.9M3.7%1 award
- ORBIS SIBRO INC$4.6M3.5%1 award
- DENNIS K. BURKE INC.$4.1M3.1%140 awards
- WATERS TECHNOLOGIES CORPORATION$3.6M2.7%50 awards
- BAE SYSTEMS LAND & ARMAMENTS L.P.$2.6M2.0%1 award
- TRUSTEES OF BOSTON COLLEGE$2.5M1.9%5 awards
Other boundaries
District lines change between plans; each plan keeps its own page.
Sources and method
Every figure on this page traces to these records.
- Congressional district boundaries and relationship files (U.S. Census Bureau)U.S. Census Bureau, Cartographic Boundary Files (congressional districts) and 2020 relationship files · release cd116+cd118+cd119 · loaded Oct 3, 2026 · license: Public domain (U.S. Government work, 17 U.S.C. § 105)
- Members of Congress, their terms, committees and identifiers (The @unitedstates project (from the Biographical Directory of the U.S. Congress, the House and the Senate))unitedstates/congress-legislators: legislators, committees and current committee membership · data current to Oct 3, 2026 · loaded Oct 3, 2026 · license: CC0 1.0 (public domain dedication)
- ZIP code (ZCTA) to congressional district crosswalk (U.S. Census Bureau)U.S. Census Bureau, 2020 relationship files (ZCTAs, tracts and congressional districts); shares computed by Analisa · release 2020 · loaded Oct 3, 2026 · license: Public domain (U.S. Government work, 17 U.S.C. § 105)
- Federal contract transactions (Federal Procurement Data System) (U.S. Department of the Treasury, USAspending.gov)USAspending.gov, prime award contract transactions (FPDS) · data current to Oct 3, 2026 · loaded Oct 3, 2026 · license: Public domain (U.S. Government work, 17 U.S.C. § 105)
- Money and votes are shown side by side; neither explains the other.