Wisconsin Assembly District 40

State Legislative District Profile (Lower Chamber)

Overview

District ID
wi-hd-040
State
Wisconsin
Chamber
Lower chamber
District Code
040
Land Area
685.2 sq mi
Water Area
27.4 sq mi

Boundary

Boundary of Wisconsin Assembly District 40

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Sauk County440.29 sq mi64.3%52.9%
Columbia County244.82 sq mi35.7%32.0%

Showing all 2 counties

Places

PlaceOverlapShare of district landShare of place land
Portage city8.91 sq mi1.3%99.8%
Baraboo city7.35 sq mi1.1%97.2%
Pardeeville village1.92 sq mi0.3%99.9%
Prairie du Sac village1.82 sq mi0.3%91.5%
Spring Green village1.67 sq mi0.2%100.0%
Sauk City village1.54 sq mi0.2%96.1%
Wyocena village1.43 sq mi0.2%100.0%
West Baraboo village1.25 sq mi0.2%99.0%
Lake Wisconsin CDP0.84 sq mi0.1%6.3%
Plain village0.83 sq mi0.1%91.6%
Merrimac village0.82 sq mi0.1%100.0%
Bluffview CDP0.39 sq mi0.1%100.0%

Showing all 12 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 236,81161.9%5.0%64.3%
WI District 622,66738.1%3.1%35.7%

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

Voters

Registered Voters
38,127
Active Voters
38,127 (100.0%)

Party Registration

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

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2023–202434,190 (89.7%)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
58,419 (± 666)
Median Age
42.5
Median Household Income
$80,045 (± $2,625)
High School Graduate or Higher (age 25+)
92.8%
Bachelor's Degree or Higher (age 25+)
26.3%

Population by Age

GroupPeopleShare
Under 1811,88820.3%
18 to 6435,12960.1%
65 and over11,40219.5%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)2,5124.3%
White, not Hispanic51,66188.4%
Black, not Hispanic9761.7%
Asian, not Hispanic4730.8%
American Indian / Alaska Native, not Hispanic1720.3%
Native Hawaiian / Pacific Islander, not Hispanic180.0%
Some other race, not Hispanic1790.3%
Two or more races, not Hispanic2,4284.2%

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
57,617
Citizen Voting Age Population (CVAP)
45,750

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic55,62196.5%
Hispanic1,9943.5%
White52,49691.1%
Black9671.7%
Asian4180.7%
American Indian / Alaska Native1690.3%
Native Hawaiian / Pacific Islander200.0%
Two or More Races2070.4%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic44,42897.1%
Hispanic1,3212.9%
White42,18292.2%
Black1,1592.5%
Asian4070.9%
American Indian / Alaska Native5751.3%
Native Hawaiian / Pacific Islander180.0%
Two or More Races1540.3%

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