Massachusetts 3rd Barnstable District

State Legislative District Profile (Lower Chamber)

Overview

District ID
ma-hd-003
State
Massachusetts
Chamber
Lower chamber
District Code
003
Land Area
69.2 sq mi
Water Area
20.3 sq mi

Boundary

Boundary of Massachusetts 3rd Barnstable District

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Barnstable County69.23 sq mi100.0%17.6%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
East Falmouth CDP5.44 sq mi7.9%100.0%
North Falmouth CDP3.89 sq mi5.6%100.0%
Pocasset CDP3.70 sq mi5.3%100.0%
New Seabury CDP2.41 sq mi3.5%100.0%
Monument Beach CDP1.71 sq mi2.5%66.2%
Bourne CDP1.70 sq mi2.5%100.0%
Mashpee Neck CDP1.27 sq mi1.8%100.0%
Teaticket CDP0.96 sq mi1.4%91.0%
West Falmouth CDP0.58 sq mi0.8%18.9%
Seabrook CDP0.35 sq mi0.5%100.0%
Popponesset CDP0.31 sq mi0.4%100.0%
Monomoscoy Island CDP0.23 sq mi0.3%99.8%
Seconsett Island CDP0.10 sq mi0.1%99.9%
Popponesset Island CDP0.07 sq mi0.1%100.0%

Showing all 14 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 944,687100.0%5.7%100.0%

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

Voters

Registered Voters
39,164
Active Voters
32,923 (84.1%)

Party Registration

PartyVotersShare
Democratic7,55819.3%
Republican4,46211.4%
Unaffiliated00.0%
Other parties27,14469.3%
No party recorded00.0%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–20266,829 (17.4%)0 (0.0%)0 (0.0%)
2023–202429,913 (76.4%)7,460 (19.0%)7,099 (18.1%)
2021–202223,109 (59.0%)6,397 (16.3%)3,818 (9.7%)
2019–202028,083 (71.7%)13,006 (33.2%)5,042 (12.9%)
2017–201822,467 (57.4%)3,974 (10.1%)3,142 (8.0%)
2015–201624,361 (62.2%)8,577 (21.9%)6,697 (17.1%)
2013–201417,662 (45.1%)3,290 (8.4%)1,909 (4.9%)
2011–201221,824 (55.7%)2,579 (6.6%)3,785 (9.7%)

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
45,987 (± 1,321)
Median Age
55.7
Median Household Income
$98,822 (± $7,066)
High School Graduate or Higher (age 25+)
96.7%
Bachelor's Degree or Higher (age 25+)
47.3%

Population by Age

GroupPeopleShare
Under 186,39213.9%
18 to 6424,82854.0%
65 and over14,76732.1%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)1,4283.1%
White, not Hispanic40,13987.3%
Black, not Hispanic8001.7%
Asian, not Hispanic5191.1%
American Indian / Alaska Native, not Hispanic5321.2%
Native Hawaiian / Pacific Islander, not Hispanic00.0%
Some other race, not Hispanic2140.5%
Two or more races, not Hispanic2,3555.1%

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
44,403
Citizen Voting Age Population (CVAP)
38,050

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic43,24897.4%
Hispanic1,1522.6%
White39,86489.8%
Black8732.0%
Asian4541.0%
American Indian / Alaska Native5171.2%
Native Hawaiian / Pacific Islander00.0%
Two or More Races2220.5%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic37,37298.2%
Hispanic6861.8%
White34,84391.6%
Black9782.6%
Asian5951.6%
American Indian / Alaska Native8662.3%
Native Hawaiian / Pacific Islander00.0%
Two or More Races1300.3%

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