Overview
- District ID
- ma-hd-121
- State
- Massachusetts
- Chamber
- Lower chamber
- District Code
- 121
- Land Area
- 4.42 sq mi
- Water Area
- 0.13 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
| County | Overlap | Share of district land | Share of county land |
|---|
| Plymouth County | 4.42 sq mi | 100.0% | 0.7% |
Showing all 1 county
Places
| Place | Overlap | Share of district land | Share of place land |
|---|
| Brockton city | 4.42 sq mi | 100.0% | 20.7% |
Showing all 1 place
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 8 | 42,514 | 100.0% | 5.4% | 100.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 24,835
- Active Voters
- 12,005 (48.3%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 9,697 | 39.0% |
| Republican | 986 | 4.0% |
| Unaffiliated | 0 | 0.0% |
| Other parties | 14,152 | 57.0% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 2,317 (9.3%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 10,655 (42.9%) | 2,667 (10.7%) | 656 (2.6%) |
| 2021–2022 | 6,768 (27.3%) | 2,389 (9.6%) | 318 (1.3%) |
| 2019–2020 | 11,649 (46.9%) | 5,295 (21.3%) | 493 (2.0%) |
| 2017–2018 | 7,421 (29.9%) | 1,351 (5.4%) | 293 (1.2%) |
| 2015–2016 | 9,532 (38.4%) | 3,479 (14.0%) | 581 (2.3%) |
| 2013–2014 | 5,520 (22.2%) | 1,015 (4.1%) | 124 (0.5%) |
| 2011–2012 | 7,746 (31.2%) | 1,016 (4.1%) | 282 (1.1%) |
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
- 42,663 (± 2,280)
- Median Age
- 33.2
- Median Household Income
- $68,741 (± $5,042)
- High School Graduate or Higher (age 25+)
- 80.3%
- Bachelor's Degree or Higher (age 25+)
- 20.6%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 11,596 | 27.2% |
| 18 to 64 | 26,410 | 61.9% |
| 65 and over | 4,657 | 10.9% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 5,570 | 13.1% |
| White, not Hispanic | 6,929 | 16.2% |
| Black, not Hispanic | 16,234 | 38.1% |
| Asian, not Hispanic | 876 | 2.1% |
| American Indian / Alaska Native, not Hispanic | 14 | 0.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 0 | 0.0% |
| Some other race, not Hispanic | 3,631 | 8.5% |
| Two or more races, not Hispanic | 9,409 | 22.1% |
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
- 34,517
- Citizen Voting Age Population (CVAP)
- 24,456
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 30,435 | 88.2% |
| Hispanic | 4,081 | 11.8% |
| White | 8,076 | 23.4% |
| Black | 20,461 | 59.3% |
| Asian | 691 | 2.0% |
| American Indian / Alaska Native | 61 | 0.2% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 56 | 0.2% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 21,869 | 89.4% |
| Hispanic | 2,589 | 10.6% |
| White | 6,768 | 27.7% |
| Black | 14,205 | 58.1% |
| Asian | 570 | 2.3% |
| American Indian / Alaska Native | 306 | 1.3% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 55 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
