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18 of the 35 seats in theColorado Senate 18 seats needed for a majority | ||||||||||||||||||||||||||||
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 Map of the incumbents: Democratic incumbent Democratic incumbent retiring or term-limited Republican incumbent Republican incumbent retiring or term-limited Vacant No election | ||||||||||||||||||||||||||||
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The2026 Colorado Senate election is scheduled to be held on November 3, 2026. Voters in 18 out of the 35 districts of the stateSenate will elect their representative for a four-year term.[1] This election will coincide with other Colorado elections of the same year and the biennialUnited States elections.
| Harris 40–50% 50–60% 60–70% 70–80% 80-90% | Trump 40–50% 50–60% 60–70% 70–80% |
In the 2024 US Presidential Election, Kamala Harris won 24 districts, while Donald Trump won 11. Republicans represented one district where Harris had won in 2024: District 30 (Harris +2.42%), represented by John Carson. Additionally, one Democrat, Nick Hinrichsen, represented District 3, which Trump won by 5.13%.
| Source | Ranking | As of |
|---|---|---|
| Sabato's Crystal Ball[5] | Safe D | January 22, 2026 |
† - Incumbent term-limited or not seeking re-election
| District | 2024 Pres.[6] | Incumbent | Party | Elected Senator | Outcome | ||
|---|---|---|---|---|---|---|---|
| 1st | R +44.4 | Byron Pelton | Rep | TBD | |||
| 3rd | R +5.1 | Nick Hinrichsen† | Dem | TBD | |||
| 4th | R +17.2 | Mark Baisley† | Rep | TBD | |||
| 7th | R +24.8 | Janice Rich | Rep | TBD | |||
| 8th | D +10.2 | Dylan Roberts | Dem | TBD | |||
| 9th | R +14.6 | Lynda Zamora Wilson | Rep | TBD | |||
| 11th | D +4.3 | Tony Exum | Dem | TBD | |||
| 15th | D +7.7 | Janice Marchman | Dem | TBD | |||
| 17th | D +39.6 | Katie Wallace | Dem | TBD | |||
| 20th | D +17.3 | Lisa Cutter | Dem | TBD | |||
| 22nd | D +32.9 | Jessie Danielson† | Dem | TBD | |||
| 24th | D +6.7 | Kyle Mullica | Dem | TBD | |||
| 25th | D +23.1 | William Lindstedt | Dem | TBD | |||
| 27th | D +12.1 | Tom Sullivan | Dem | TBD | |||
| 30th | D +2.4 | John Carson | Rep | TBD | |||
| 32nd | D +47.7 | Robert Rodriguez† | Dem | TBD | |||
| 34th | D +57.8 | Julie Gonzales† | Dem | TBD | |||
| 35th | R +43.5 | Rod Pelton | Rep | TBD | |||
