South Dakota State Senate seat · lines in effect since 2022
South Dakota Legislative District 23
A district of about 25,000 people, 29% of adults with a bachelor's degree. It votes R+62.0 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 | 2018 | 2020 | |
|---|---|---|---|
| U.S. Senate | R+57.7 | No race | R+55.2 |
| Governor | No race | R+20.3 | No race |
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 23.
Lower than 52% of seats.
Higher than 81% of seats.
Lower than 90% of seats.
Higher than 68% of seats.
Higher than 81% of seats.
Less dense than 94% 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 2123% college gradsR+53.9Held RDistrict 19
25% college gradsR+54.6Held RDistrict 29
28% college gradsR+52.7Held RDistrict 4
24% college gradsR+53.0Held 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.
- Mark Lapka (R)
2025– · Won 2024 unopposed, 2026 unopposed - Bryan J. Breitling (R)
2023–2025 · Won 2022 unopposed
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)