Massachusetts First Middlesex District

State Legislative District Profile (Upper Chamber)

Overview

District ID
ma-sd-d11
State
Massachusetts
Chamber
Upper chamber (state senate)
District Code
D11
Land Area
90.1 sq mi
Water Area
3.86 sq mi

Boundary

Boundary of Massachusetts First Middlesex District

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Middlesex County90.11 sq mi100.0%11.0%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Lowell city13.61 sq mi15.1%100.0%
Pepperell CDP2.07 sq mi2.3%100.0%
East Pepperell CDP1.42 sq mi1.6%100.0%

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 3175,513100.0%22.5%100.0%

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

Voters

Registered Voters
126,816
Active Voters
76,064 (60.0%)

Party Registration

PartyVotersShare
Democratic27,30121.5%
Republican<10—
Unaffiliated00.0%
Other parties89,64470.7%
No party recorded<10—

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202613,733 (10.8%)0 (0.0%)0 (0.0%)
2023–202469,533 (54.8%)16,831 (13.3%)12,975 (10.2%)
2021–202245,793 (36.1%)12,022 (9.5%)5,770 (4.5%)
2019–202068,272 (53.8%)28,719 (22.6%)8,353 (6.6%)
2017–201848,648 (38.4%)16,227 (12.8%)5,395 (4.3%)
2015–201657,032 (45.0%)21,014 (16.6%)12,245 (9.7%)
2013–201436,040 (28.4%)7,794 (6.1%)2,708 (2.1%)
2011–201246,632 (36.8%)3,825 (3.0%)6,305 (5.0%)

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
178,563 (± 70)
Median Age
37.3
Median Household Income
$90,812 (± $3,540)
High School Graduate or Higher (age 25+)
86.6%
Bachelor's Degree or Higher (age 25+)
34.3%

Population by Age

GroupPeopleShare
Under 1838,68721.7%
18 to 64114,51064.1%
65 and over25,36614.2%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)28,00715.7%
White, not Hispanic97,70954.7%
Black, not Hispanic14,2768.0%
Asian, not Hispanic29,54716.5%
American Indian / Alaska Native, not Hispanic130.0%
Native Hawaiian / Pacific Islander, not Hispanic100.0%
Some other race, not Hispanic1,6360.9%
Two or more races, not Hispanic7,3654.1%

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
159,249
Citizen Voting Age Population (CVAP)
122,985

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic134,88284.7%
Hispanic24,36715.3%
White97,25961.1%
Black11,0366.9%
Asian23,16514.5%
American Indian / Alaska Native90.0%
Native Hawaiian / Pacific Islander90.0%
Two or More Races6400.4%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic107,52787.4%
Hispanic15,45812.6%
White81,28466.1%
Black7,7756.3%
Asian17,86714.5%
American Indian / Alaska Native3850.3%
Native Hawaiian / Pacific Islander120.0%
Two or More Races2410.2%

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