South Dakota State Senate District 1

State Legislative District Profile (Upper Chamber)

Overview

District ID
sd-sd-001
State
South Dakota
Chamber
Upper chamber (state senate)
District Code
001
Land Area
4,392.4 sq mi
Water Area
153.3 sq mi

Boundary

Boundary of South Dakota State Senate District 1

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Brown County1633.19 sq mi37.2%95.3%
Day County1028.49 sq mi23.4%100.0%
Roberts County892.66 sq mi20.3%81.1%
Marshall County838.08 sq mi19.1%100.0%

Showing all 4 counties

Places

PlaceOverlapShare of district landShare of place land
Long Hollow CDP14.43 sq mi0.3%100.0%
Agency Village CDP7.15 sq mi0.2%100.0%
Ortley town2.24 sq mi0.1%100.0%
Mansfield CDP1.77 sq mi<0.1%73.3%
Groton city1.75 sq mi<0.1%100.0%
Webster city1.62 sq mi<0.1%100.0%
Sisseton city1.59 sq mi<0.1%100.0%
White Rock town1.57 sq mi<0.1%100.0%
Columbia city1.52 sq mi<0.1%100.0%
Waubay city1.45 sq mi<0.1%99.9%
Frederick town1.35 sq mi<0.1%100.0%
Westwood Colony CDP1.01 sq mi<0.1%100.0%
Ferney CDP1.00 sq mi<0.1%100.0%
Clear Lake city0.98 sq mi<0.1%29.7%
Sunset Colony CDP0.97 sq mi<0.1%100.0%
Enemy Swim CDP0.93 sq mi<0.1%100.0%
Britton city0.73 sq mi<0.1%100.0%
White Rock Colony CDP0.57 sq mi<0.1%100.0%
Summit town0.55 sq mi<0.1%100.0%
Bristol city0.52 sq mi<0.1%100.0%
Hecla city0.34 sq mi<0.1%100.0%
Langford town0.32 sq mi<0.1%100.0%
Veblen city0.31 sq mi<0.1%100.0%
Rosholt town0.30 sq mi<0.1%99.9%
Bath CDP0.29 sq mi<0.1%100.0%

Showing top 25 of 45 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
SD At-Large26,600100.0%3.0%100.0%

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

Voters

Registered Voters
18,569
Active Voters
17,575 (94.6%)

Party Registration

PartyVotersShare
Democratic6,09532.8%
Republican8,61946.4%
Unaffiliated1,2436.7%
Other parties2,59414.0%
No party recorded180.1%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2023–202412,877 (69.3%)0 (0.0%)0 (0.0%)
2021–202210,605 (57.1%)0 (0.0%)0 (0.0%)
2019–202012,186 (65.6%)0 (0.0%)0 (0.0%)
2017–201810,248 (55.2%)0 (0.0%)0 (0.0%)
2015–201610,345 (55.7%)0 (0.0%)0 (0.0%)
2013–20147,977 (43.0%)0 (0.0%)0 (0.0%)
2011–20129,437 (50.8%)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 01/20/2026. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Population
26,651 (± 459)
Median Age
41.3
Median Household Income
$73,861 (± $3,792)
High School Graduate or Higher (age 25+)
93.1%
Bachelor's Degree or Higher (age 25+)
23.1%

Population by Age

GroupPeopleShare
Under 187,03426.4%
18 to 6413,65751.2%
65 and over5,96022.4%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)9073.4%
White, not Hispanic20,16775.7%
Black, not Hispanic400.2%
Asian, not Hispanic2611.0%
American Indian / Alaska Native, not Hispanic4,30716.2%
Native Hawaiian / Pacific Islander, not Hispanic00.0%
Some other race, not Hispanic400.2%
Two or more races, not Hispanic9293.5%

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
26,334
Citizen Voting Age Population (CVAP)
19,358

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic25,66997.5%
Hispanic6612.5%
White20,34177.2%
Black380.1%
Asian2240.9%
American Indian / Alaska Native4,32416.4%
Native Hawaiian / Pacific Islander10.0%
Two or More Races800.3%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic19,13398.8%
Hispanic2271.2%
White15,92782.3%
Black1270.7%
Asian1410.7%
American Indian / Alaska Native2,92915.1%
Native Hawaiian / Pacific Islander00.0%
Two or More Races210.1%

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