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Massachusetts's 4th district

U.S. House district profile: the sitting representative, 2024 Census demographics (119th-district boundaries), partisan lean, and 2026 race rating.

Representative

Official portrait of Jake Auchincloss

Jake Auchincloss

MA · District 4
Democrat
Raised $3,630,329 · 26K followers (office + personal) · missed 4.8% of votes
5.7 years in Congress · Up for reelection: 2026
House Committee on Energy and Commerce · Energy +2 more
View profile

Cook PVI: D+11

District demographics

MeasureValue
Population802,402
Median household income$115,485
Median age41.8
Bachelor's degree or higher50.5%
White alone74.2%
Black alone4.5%
Hispanic or Latino6.9%
Asian alone7.2%
Unemployment rate3.4%
Population density (per sq mi)1,194

Source: U.S. Census Bureau, 2024 American Community Survey 1-year estimates (tables B01003, B01002, B19013 and related), 119th Congress district boundaries, released September 2025; land area from the 2025 Gazetteer.