Massachusetts 15th Suffolk District

State Legislative District Profile (Lower Chamber)

Overview

District ID
ma-hd-137
State
Massachusetts
Chamber
Lower chamber
District Code
137
Land Area
2.85 sq mi
Water Area
0.02 sq mi

Boundary

Boundary of Massachusetts 15th 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 County2.85 sq mi100.0%4.9%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Boston city2.85 sq mi100.0%5.9%

Showing all 1 place

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 732,48972.2%4.2%67.8%
MA District 812,52327.8%1.6%32.2%

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

Voters

Registered Voters
31,297
Active Voters
27,774 (88.7%)

Party Registration

PartyVotersShare
Democratic14,36845.9%
Republican6091.9%
Unaffiliated00.0%
Other parties16,32052.1%
No party recorded00.0%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202611,205 (35.8%)0 (0.0%)0 (0.0%)
2023–202420,067 (64.1%)7,692 (24.6%)731 (2.3%)
2021–202215,988 (51.1%)7,430 (23.7%)163 (0.5%)
2019–202018,962 (60.6%)13,923 (44.5%)302 (1.0%)
2017–201814,306 (45.7%)7,576 (24.2%)179 (0.6%)
2015–201614,386 (46.0%)8,475 (27.1%)507 (1.6%)
2013–20149,372 (29.9%)3,391 (10.8%)74 (0.2%)
2011–201211,056 (35.3%)2,302 (7.4%)303 (1.0%)

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
44,128 (± 1,911)
Median Age
33.7
Median Household Income
$107,231 (± $4,604)
High School Graduate or Higher (age 25+)
89.4%
Bachelor's Degree or Higher (age 25+)
66.1%

Population by Age

GroupPeopleShare
Under 186,35314.4%
18 to 6431,94472.4%
65 and over5,83113.2%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)9,37421.2%
White, not Hispanic22,48451.0%
Black, not Hispanic5,43412.3%
Asian, not Hispanic4,3709.9%
American Indian / Alaska Native, not Hispanic210.0%
Native Hawaiian / Pacific Islander, not Hispanic260.1%
Some other race, not Hispanic5321.2%
Two or more races, not Hispanic1,8874.3%

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
39,858
Citizen Voting Age Population (CVAP)
33,669

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic31,64679.4%
Hispanic8,21320.6%
White22,66456.9%
Black5,47613.7%
Asian2,3465.9%
American Indian / Alaska Native200.1%
Native Hawaiian / Pacific Islander250.1%
Two or More Races430.1%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic28,07483.4%
Hispanic5,59116.6%
White20,30760.3%
Black5,19615.4%
Asian2,4447.3%
American Indian / Alaska Native1220.4%
Native Hawaiian / Pacific Islander270.1%
Two or More Races330.1%

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