Overview
- District ID
- sd-sd-018
- State
- South Dakota
- Chamber
- Upper chamber (state senate)
- District Code
- 018
- Land Area
- 593 sq mi
- Water Area
- 11.1 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 2 counties
Places
Showing all 9 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 |
|---|
| SD At-Large | 24,139 | 100.0% | 2.7% | 100.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 16,427
- Active Voters
- 15,045 (91.6%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 3,728 | 22.7% |
| Republican | 8,249 | 50.2% |
| Unaffiliated | 1,495 | 9.1% |
| Other parties | 2,955 | 18.0% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2023–2024 | 11,267 (68.6%) | 0 (0.0%) | 0 (0.0%) |
| 2021–2022 | 8,974 (54.6%) | 0 (0.0%) | 0 (0.0%) |
| 2019–2020 | 10,442 (63.6%) | 0 (0.0%) | 0 (0.0%) |
| 2017–2018 | 8,330 (50.7%) | 0 (0.0%) | 0 (0.0%) |
| 2015–2016 | 8,505 (51.8%) | 0 (0.0%) | 0 (0.0%) |
| 2013–2014 | 6,406 (39.0%) | 0 (0.0%) | 0 (0.0%) |
| 2011–2012 | 7,841 (47.7%) | 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 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
- 24,213 (± 152)
- Median Age
- 42.6
- Median Household Income
- $72,660 (± $6,585)
- High School Graduate or Higher (age 25+)
- 93.5%
- Bachelor's Degree or Higher (age 25+)
- 31.2%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 5,118 | 21.1% |
| 18 to 64 | 13,830 | 57.1% |
| 65 and over | 5,265 | 21.7% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 1,370 | 5.7% |
| White, not Hispanic | 21,101 | 87.1% |
| Black, not Hispanic | 374 | 1.5% |
| Asian, not Hispanic | 76 | 0.3% |
| American Indian / Alaska Native, not Hispanic | 480 | 2.0% |
| Native Hawaiian / Pacific Islander, not Hispanic | 0 | 0.0% |
| Some other race, not Hispanic | 3 | 0.0% |
| Two or more races, not Hispanic | 809 | 3.3% |
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
- 23,705
- Citizen Voting Age Population (CVAP)
- 18,637
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 22,721 | 95.8% |
| Hispanic | 979 | 4.1% |
| White | 21,168 | 89.3% |
| Black | 375 | 1.6% |
| Asian | 41 | 0.2% |
| American Indian / Alaska Native | 480 | 2.0% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 37 | 0.2% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 18,080 | 97.0% |
| Hispanic | 554 | 3.0% |
| White | 17,002 | 91.2% |
| Black | 389 | 2.1% |
| Asian | 48 | 0.3% |
| American Indian / Alaska Native | 614 | 3.3% |
| Native Hawaiian / Pacific Islander | 1 | 0.0% |
| Two or More Races | 31 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
