South Dakota State Senate seat · lines in effect since 2022
South Dakota Legislative District 21
A district of about 24,000 people, 23% of adults with a bachelor's degree. It votes R+53.9 relative to the nation for president.
Where it sits among all 32 seats
Every South Dakota State Senate seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2016 | 2020 | 2022 | 2024 | 2026 | |
|---|---|---|---|---|---|
| U.S. Senate | R+43.6 | R+36.5 | No race | No race | No race |
| South Dakota State Senate | No race | No race | R+63.7 | R+54.1 | R+51.6 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: South Dakota Secretary of StateUpdated Nov 7, 2026, 3:01 PM ET
Who lives here, compared
Grey bars show the spread of all 32 seats. Small marks are other seats in South Dakota. The black marker is District 21.
Lower than 84% of seats.
Higher than 74% of seats.
Lower than 81% of seats.
Lower than 74% of seats.
Lower than 68% of seats.
Less dense than 84% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean.
District 1925% college gradsR+54.6Held RDistrict 16
27% college gradsR+45.0Held RDistrict 4
24% college gradsR+53.0Held RDistrict 29
28% college gradsR+52.7Held R
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Who has held it
These lines took effect in 2022.
- Mykala Voita (R)
2025– · Won 2024 by 54.1, 2026 by 51.6 - Erin Tobin (R)
2023–2025 · Won 2022 by 63.7
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)