Overview
- District ID
- ct-sd-031
- State
- Connecticut
- Chamber
- Upper chamber (state senate)
- District Code
- 031
- Land Area
- 91.1 sq mi
- Water Area
- 1.43 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Places
Showing all 4 places
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 |
|---|
| CT District 1 | 60,833 | 61.0% | 8.4% | 29.0% |
| CT District 5 | 38,914 | 39.0% | 5.4% | 71.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 70,618
- Active Voters
- 66,614 (94.3%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 19,889 | 28.2% |
| Republican | 18,250 | 25.8% |
| Unaffiliated | 31,177 | 44.1% |
| Other parties | 1,302 | 1.8% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 838 (1.2%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 51,302 (72.6%) | 0 (0.0%) | 0 (0.0%) |
| 2021–2022 | 37,210 (52.7%) | 0 (0.0%) | 0 (0.0%) |
| 2019–2020 | 49,296 (69.8%) | 0 (0.0%) | 0 (0.0%) |
| 2017–2018 | 34,997 (49.6%) | 0 (0.0%) | 0 (0.0%) |
| 2015–2016 | 39,657 (56.2%) | 0 (0.0%) | 0 (0.0%) |
| 2013–2014 | 26,334 (37.3%) | 0 (0.0%) | 0 (0.0%) |
| 2011–2012 | 30,800 (43.6%) | 0 (0.0%) | 0 (0.0%) |
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 11/04/2025. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".
Demographics
- Total Population
- 100,475 (± 261)
- Median Age
- 40.1
- Median Household Income
- $84,926 (± $2,751)
- High School Graduate or Higher (age 25+)
- 93.6%
- Bachelor's Degree or Higher (age 25+)
- 30.7%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 19,000 | 18.9% |
| 18 to 64 | 63,854 | 63.6% |
| 65 and over | 17,621 | 17.5% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 16,690 | 16.6% |
| White, not Hispanic | 69,486 | 69.2% |
| Black, not Hispanic | 5,128 | 5.1% |
| Asian, not Hispanic | 3,623 | 3.6% |
| American Indian / Alaska Native, not Hispanic | 53 | 0.1% |
| Native Hawaiian / Pacific Islander, not Hispanic | 29 | 0.0% |
| Some other race, not Hispanic | 510 | 0.5% |
| Two or more races, not Hispanic | 4,956 | 4.9% |
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
- 96,545
- Citizen Voting Age Population (CVAP)
- 77,833
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 81,273 | 84.2% |
| Hispanic | 15,268 | 15.8% |
| White | 70,304 | 72.8% |
| Black | 4,818 | 5.0% |
| Asian | 2,699 | 2.8% |
| American Indian / Alaska Native | 59 | 0.1% |
| Native Hawaiian / Pacific Islander | 30 | 0.0% |
| Two or More Races | 699 | 0.7% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 67,693 | 87.0% |
| Hispanic | 10,136 | 13.0% |
| White | 59,552 | 76.5% |
| Black | 4,643 | 6.0% |
| Asian | 2,508 | 3.2% |
| American Indian / Alaska Native | 559 | 0.7% |
| Native Hawaiian / Pacific Islander | 30 | 0.0% |
| Two or More Races | 511 | 0.7% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
