Wisconsin State Senate District 27

State Legislative District Profile (Upper Chamber)

Overview

District ID
wi-sd-027
State
Wisconsin
Chamber
Upper chamber (state senate)
District Code
027
Land Area
338.2 sq mi
Water Area
9.35 sq mi

Boundary

Boundary of Wisconsin State Senate District 27

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Dane County338.20 sq mi100.0%28.3%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Madison city29.31 sq mi8.7%35.1%
Middleton city8.93 sq mi2.6%95.1%
Verona city7.48 sq mi2.2%90.4%
Waunakee village7.17 sq mi2.1%96.9%
Cross Plains village1.80 sq mi0.5%95.7%
Mazomanie village1.76 sq mi0.5%99.3%
Dane village1.18 sq mi0.3%100.0%
Black Earth village0.84 sq mi0.2%100.0%

Showing all 8 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
WI District 2179,647100.0%24.4%100.0%

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

Voters

Registered Voters
135,639
Active Voters
135,639 (100.0%)

Party Registration

This state's voter file does not record party registration.

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2023–2024121,434 (89.5%)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
185,808 (± 2,483)
Median Age
39.3
Median Household Income
$103,724 (± $2,196)
High School Graduate or Higher (age 25+)
97.1%
Bachelor's Degree or Higher (age 25+)
61.9%

Population by Age

GroupPeopleShare
Under 1840,63421.9%
18 to 64111,73960.1%
65 and over33,43518.0%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)15,2648.2%
White, not Hispanic141,48976.1%
Black, not Hispanic6,9173.7%
Asian, not Hispanic12,6366.8%
American Indian / Alaska Native, not Hispanic3140.2%
Native Hawaiian / Pacific Islander, not Hispanic280.0%
Some other race, not Hispanic1,2440.7%
Two or more races, not Hispanic7,9164.3%

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
176,184
Citizen Voting Age Population (CVAP)
136,452

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic164,57893.4%
Hispanic11,6026.6%
White142,91981.1%
Black6,7133.8%
Asian9,0175.1%
American Indian / Alaska Native3130.2%
Native Hawaiian / Pacific Islander270.0%
Two or More Races5350.3%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic129,60795.0%
Hispanic6,8465.0%
White115,00484.3%
Black5,7604.2%
Asian7,6805.6%
American Indian / Alaska Native7820.6%
Native Hawaiian / Pacific Islander220.0%
Two or More Races3990.3%

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