Overview
- District ID
- ma-sd-d39
- State
- Massachusetts
- Chamber
- Upper chamber (state senate)
- District Code
- D39
- Land Area
- 302.5 sq mi
- Water Area
- 244 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 2 counties
Places
Showing top 25 of 26 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 9 | 184,504 | 100.0% | 23.6% | 100.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 159,255
- Active Voters
- 132,664 (83.3%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 28,719 | 18.0% |
| Republican | <10 | — |
| Unaffiliated | 0 | 0.0% |
| Other parties | 112,074 | 70.4% |
| No party recorded | <10 | — |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 23,329 (14.6%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 120,670 (75.8%) | 29,036 (18.2%) | 30,075 (18.9%) |
| 2021–2022 | 90,749 (57.0%) | 22,503 (14.1%) | 14,144 (8.9%) |
| 2019–2020 | 112,509 (70.6%) | 49,731 (31.2%) | 20,678 (13.0%) |
| 2017–2018 | 87,155 (54.7%) | 15,254 (9.6%) | 13,098 (8.2%) |
| 2015–2016 | 97,082 (61.0%) | 31,874 (20.0%) | 25,493 (16.0%) |
| 2013–2014 | 67,593 (42.4%) | 12,285 (7.7%) | 7,556 (4.7%) |
| 2011–2012 | 85,738 (53.8%) | 9,943 (6.2%) | 14,458 (9.1%) |
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
- 188,565 (± 105)
- Median Age
- 50.6
- Median Household Income
- $111,304 (± $3,373)
- High School Graduate or Higher (age 25+)
- 96.3%
- Bachelor's Degree or Higher (age 25+)
- 47.6%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 31,425 | 16.7% |
| 18 to 64 | 105,610 | 56.0% |
| 65 and over | 51,530 | 27.3% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 5,468 | 2.9% |
| White, not Hispanic | 168,096 | 89.1% |
| Black, not Hispanic | 2,044 | 1.1% |
| Asian, not Hispanic | 2,126 | 1.1% |
| American Indian / Alaska Native, not Hispanic | 662 | 0.4% |
| Native Hawaiian / Pacific Islander, not Hispanic | 61 | 0.0% |
| Some other race, not Hispanic | 1,859 | 1.0% |
| Two or more races, not Hispanic | 8,249 | 4.4% |
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
- 183,175
- Citizen Voting Age Population (CVAP)
- 152,319
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 178,506 | 97.5% |
| Hispanic | 4,667 | 2.5% |
| White | 169,008 | 92.3% |
| Black | 2,368 | 1.3% |
| Asian | 1,606 | 0.9% |
| American Indian / Alaska Native | 648 | 0.4% |
| Native Hawaiian / Pacific Islander | 63 | 0.0% |
| Two or More Races | 409 | 0.2% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 149,392 | 98.1% |
| Hispanic | 2,932 | 1.9% |
| White | 142,497 | 93.6% |
| Black | 2,948 | 1.9% |
| Asian | 2,114 | 1.4% |
| American Indian / Alaska Native | 1,615 | 1.1% |
| Native Hawaiian / Pacific Islander | 61 | 0.0% |
| Two or More Races | 273 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
