Colorado State Senate · 2026 general · 17 of 35 seats up
Democrats keep a majority in the Colorado State Senate
Democrats hold 21 seats and Republicans 11, with 3 still being counted; 18 make a majority.
0 seats flipped to Democrats0 to Republicans3 still uncalled
Seats not up in this election count with their holders. Source: Results and race calls: Colorado Secretary of State and civicAPI (unofficial)Updated Nov 7, 2026, 3:01 PM ET
Source: Results and race calls: Colorado Secretary of State and civicAPI (unofficial)Updated Nov 7, 2026, 3:01 PM ET
Every race, by how close it was
All 16 races by the winner’s margin, D − R. The shaded band holds the 1 race decided by under 5 points. Ringed dots flipped; amber dots are still being counted. The seat won without an opponent sits at its end.
- Democratic
- Republican
- Counting
- Flipped
- Under 5 points
Unofficial returns. Source: Results and race calls: Colorado Secretary of State and civicAPI (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: Colorado Secretary of State and civicAPI (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 +11.1.
13 contested districts; districts uncontested in either election are left out.
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)
Colorado State Senate in other elections
- 2024 Dem. 23–12
- 2022 Dem. 22–13
- 2020 Dem. 20–15
- 2018 Dem. 19–16
- The Colorado State Senate →
Also on this ballot
Sources