Overview
- District ID
- wi-sd-031
- State
- Wisconsin
- Chamber
- Upper chamber (state senate)
- District Code
- 031
- Land Area
- 1,260.9 sq mi
- Water Area
- 24.3 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 4 counties
Places
Showing all 18 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 |
|---|
| WI District 3 | 175,556 | 98.4% | 23.8% | 96.8% |
| WI District 7 | 2,884 | 1.6% | 0.4% | 3.2% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 116,328
- Active Voters
- 116,328 (100.0%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2023–2024 | 103,899 (89.3%) | 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 05/15/2025. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".
Demographics
- Total Population
- 179,708 (± 730)
- Median Age
- 36.5
- Median Household Income
- $74,348 (± $1,702)
- High School Graduate or Higher (age 25+)
- 95.4%
- Bachelor's Degree or Higher (age 25+)
- 33.8%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 35,966 | 20.0% |
| 18 to 64 | 113,127 | 63.0% |
| 65 and over | 30,615 | 17.0% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 5,230 | 2.9% |
| White, not Hispanic | 159,274 | 88.6% |
| Black, not Hispanic | 1,949 | 1.1% |
| Asian, not Hispanic | 6,541 | 3.6% |
| American Indian / Alaska Native, not Hispanic | 457 | 0.3% |
| Native Hawaiian / Pacific Islander, not Hispanic | 145 | 0.1% |
| Some other race, not Hispanic | 604 | 0.3% |
| Two or more races, not Hispanic | 5,508 | 3.1% |
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
- 177,227
- Citizen Voting Age Population (CVAP)
- 141,420
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 172,990 | 97.6% |
| Hispanic | 4,239 | 2.4% |
| White | 161,143 | 90.9% |
| Black | 1,686 | 1.0% |
| Asian | 5,648 | 3.2% |
| American Indian / Alaska Native | 457 | 0.3% |
| Native Hawaiian / Pacific Islander | 145 | 0.1% |
| Two or More Races | 514 | 0.3% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 138,975 | 98.3% |
| Hispanic | 2,442 | 1.7% |
| White | 131,285 | 92.8% |
| Black | 1,767 | 1.2% |
| Asian | 4,432 | 3.1% |
| American Indian / Alaska Native | 1,157 | 0.8% |
| Native Hawaiian / Pacific Islander | 110 | 0.1% |
| Two or More Races | 232 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
