Overview
- District ID
- ma-sd-d04
- State
- Massachusetts
- Chamber
- Upper chamber (state senate)
- District Code
- D04
- Land Area
- 268.9 sq mi
- Water Area
- 6.65 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 3 counties
Places
Showing all 9 places
Overlapping Congressional Districts
| Congressional district | Population in both | Share of this district's population | Share of the congressional district's population | Share of this district's land |
|---|
| MA District 1 | 167,192 | 100.0% | 21.4% | 100.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 137,518
- Active Voters
- 118,503 (86.2%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 29,972 | 21.8% |
| Republican | <10 | — |
| Unaffiliated | 0 | 0.0% |
| Other parties | 91,522 | 66.6% |
| No party recorded | <10 | — |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 22,333 (16.2%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 95,599 (69.5%) | 20,060 (14.6%) | 16,759 (12.2%) |
| 2021–2022 | 68,031 (49.5%) | 17,620 (12.8%) | 6,890 (5.0%) |
| 2019–2020 | 90,601 (65.9%) | 38,838 (28.2%) | 10,948 (8.0%) |
| 2017–2018 | 67,340 (49.0%) | 13,681 (9.9%) | 6,357 (4.6%) |
| 2015–2016 | 77,045 (56.0%) | 28,745 (20.9%) | 16,663 (12.1%) |
| 2013–2014 | 53,677 (39.0%) | 12,805 (9.3%) | 3,365 (2.4%) |
| 2011–2012 | 65,500 (47.6%) | 11,657 (8.5%) | 8,416 (6.1%) |
Turnout counts today's registered voters with a counted ballot in the cycle's elections (the odd and even year), as a share of today's registered voters. Voters who have since left the rolls are not counted.
Browse the voter list for this district (premium access; sign-in required)
Source: Civitech voter file snapshot as of 12/07/2025. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".
Demographics
- Total Population
- 168,047 (± 2,563)
- Median Age
- 44.1
- Median Household Income
- $93,372 (± $3,175)
- High School Graduate or Higher (age 25+)
- 93.4%
- Bachelor's Degree or Higher (age 25+)
- 39.6%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 31,469 | 18.7% |
| 18 to 64 | 99,964 | 59.5% |
| 65 and over | 36,614 | 21.8% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 16,030 | 9.5% |
| White, not Hispanic | 134,424 | 80.0% |
| Black, not Hispanic | 5,675 | 3.4% |
| Asian, not Hispanic | 5,109 | 3.0% |
| American Indian / Alaska Native, not Hispanic | 45 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 13 | 0.0% |
| Some other race, not Hispanic | 868 | 0.5% |
| Two or more races, not Hispanic | 5,883 | 3.5% |
Source: U.S. Census Bureau, American Community Survey 2020-2024 ACS 5-year estimates (tables B01001, B01002, B01003, B03002, B15003, B19013) for this state legislative district. Estimates are survey-based; ± figures are 90% margins of error.
Citizen Voting Age Population
- Total Citizen Population
- 163,990
- Citizen Voting Age Population (CVAP)
- 132,819
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 148,338 | 90.5% |
| Hispanic | 15,653 | 9.5% |
| White | 134,675 | 82.1% |
| Black | 5,552 | 3.4% |
| Asian | 3,761 | 2.3% |
| American Indian / Alaska Native | 55 | 0.0% |
| Native Hawaiian / Pacific Islander | 10 | 0.0% |
| Two or More Races | 665 | 0.4% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 122,256 | 92.0% |
| Hispanic | 10,568 | 8.0% |
| White | 112,423 | 84.6% |
| Black | 5,486 | 4.1% |
| Asian | 3,306 | 2.5% |
| American Indian / Alaska Native | 635 | 0.5% |
| Native Hawaiian / Pacific Islander | 9 | 0.0% |
| Two or More Races | 452 | 0.3% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
