Massachusetts Third Suffolk District

State Legislative District Profile (Upper Chamber)

Overview

District ID
ma-sd-d25
State
Massachusetts
Chamber
Upper chamber (state senate)
District Code
D25
Land Area
14.2 sq mi
Water Area
14.5 sq mi

Boundary

Boundary of Massachusetts Third Suffolk District

Boundary as GeoJSON

Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.

Counties

CountyOverlapShare of district landShare of county land
Suffolk County14.18 sq mi100.0%24.3%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Boston city6.48 sq mi45.7%13.4%
Revere city5.70 sq mi40.2%100.0%
Winthrop Town city1.99 sq mi14.0%99.8%

Showing all 3 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
MA District 581,50244.3%10.4%54.3%
MA District 758,22031.7%7.5%35.2%
MA District 844,15824.0%5.7%10.5%

Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).

Voters

Registered Voters
108,241
Active Voters
88,456 (81.7%)

Party Registration

PartyVotersShare
Democratic31,64429.2%
Republican6,5196.0%
Unaffiliated00.0%
Other parties70,07864.7%
No party recorded00.0%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202626,845 (24.8%)0 (0.0%)0 (0.0%)
2023–202467,601 (62.5%)15,309 (14.1%)6,689 (6.2%)
2021–202245,935 (42.4%)13,591 (12.6%)2,668 (2.5%)
2019–202061,939 (57.2%)32,140 (29.7%)4,587 (4.2%)
2017–201842,375 (39.1%)11,663 (10.8%)2,656 (2.5%)
2015–201647,652 (44.0%)18,907 (17.5%)6,536 (6.0%)
2013–201431,336 (29.0%)8,037 (7.4%)1,565 (1.4%)
2011–201236,269 (33.5%)5,777 (5.3%)3,389 (3.1%)

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
177,196 (± 2,588)
Median Age
35.6
Median Household Income
$102,489 (± $4,048)
High School Graduate or Higher (age 25+)
86.7%
Bachelor's Degree or Higher (age 25+)
48.0%

Population by Age

GroupPeopleShare
Under 1826,35714.9%
18 to 64126,05671.1%
65 and over24,78314.0%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)53,75530.3%
White, not Hispanic96,24654.3%
Black, not Hispanic6,7683.8%
Asian, not Hispanic11,7486.6%
American Indian / Alaska Native, not Hispanic1160.1%
Native Hawaiian / Pacific Islander, not Hispanic00.0%
Some other race, not Hispanic2,0431.2%
Two or more races, not Hispanic6,5203.7%

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
139,351
Citizen Voting Age Population (CVAP)
116,071

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic110,11179.0%
Hispanic29,23921.0%
White92,85066.6%
Black6,2364.5%
Asian7,4565.4%
American Indian / Alaska Native1750.1%
Native Hawaiian / Pacific Islander30.0%
Two or More Races4720.3%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic96,63783.3%
Hispanic19,43616.7%
White82,71771.3%
Black5,8715.1%
Asian7,1606.2%
American Indian / Alaska Native5100.4%
Native Hawaiian / Pacific Islander00.0%
Two or More Races3880.3%

Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).