South Dakota State Senate · 2026 general · all 35 seats
Republicans keep a majority in the South Dakota State Senate
Democrats hold 2 seats and Republicans 32, with 1 still being counted; 18 make a majority. 1 seat changed party.
0 seats flipped to Democrats1 to Republicans1 still uncalled
Source: Results and race calls: South Dakota Secretary of State (unofficial)Updated Nov 7, 2026, 3:01 PM ET
Source: Results and race calls: South Dakota Secretary of State (unofficial)Updated Nov 7, 2026, 3:01 PM ET
Every race, by how close it was
All 33 races by the winner’s margin, D − R. The shaded band holds the 5 races decided by under 5 points. Ringed dots flipped; amber dots are still being counted. The 21 seats won without an opponent sit at the ends.
- Democratic
- Republican
- Counting
- Flipped
- Under 5 points
Unofficial returns. Source: Results and race calls: South Dakota Secretary of State (unofficial)Updated Nov 7, 2026, 3:01 PM ET
Closest called races
Smallest winning margins.
Biggest swings
Change in margin from the last race on the same lines.
Source: Results and race calls: South Dakota Secretary of State (unofficial)Updated Nov 7, 2026, 3:01 PM ET
How far each district moved
Change in each contested district’s margin from the previous election, in 2-point bins. The median district moved D +7.6.
11 contested districts; districts uncontested in either election are left out.
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)
South Dakota State Senate in other elections
- 2024 Rep. 32–3
- 2022 Rep. 31–4
- 2020 Rep. 32–3
- 2018 Rep. 30–5
- The South Dakota State Senate →
Also on this ballot
Sources