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15 DAYS OUT
NE GovPillen R +0.8GA GovBottoms D +0.8KS GovHolscher D +0.8KS SenMarshall R +1.3IA SenTurek D +1.4AK SenPeltola D +1.4SC SenAndrews D +1.5TX SenTalarico D +2.0TX GovAbbott R +2.2ME SenJackson D +2.5WI GovCrowley D +2.8NE SenOsborn I +3.4OH SenBrown D +3.8NV GovFord D +4.0OH GovActon D +4.7FL GovDonalds R +4.9
2026 state legislative forecast

Colorado Senate forecast

Democrats win control of the Colorado Senate in nearly every one of 2,000 simulations, against a Democratic majority today. 21 of the 35 seats are on the 2026 ballot and 14 carry over until 2028; 1 race is within a 35 to 65 split.

Safe DUpdated October 17, 2026Seats 35On the ballot 21Colorado HouseAll chambers
Chance of control
>99%D<1%R
Democratic seats, 80% range
22 to 24
Median 24 · 18 for a majority
Favored to flip
1to D0to R
After 2024: 23 D, 12 R
Environment
D +11.0
Shift from the 2024 presidential vote

Colorado Senate map

District 1: Democrats <1%District 2, not up in 2026District 3: Democrats 93%District 4: Democrats 1%District 5, not up in 2026District 6, not up in 2026District 7: Democrats <1%District 8: Democrats >99%District 9: Democrats <1%District 10, not up in 2026District 11: Democrats 97%District 12, not up in 2026District 13, not up in 2026District 14, not up in 2026District 15: Democrats 90%District 16, not up in 2026District 17: Democrats >99%District 18, not up in 2026District 19, not up in 2026District 20: Democrats >99%District 21: Democrats 99%District 22: Democrats >99%District 23, not up in 2026District 24: Democrats >99%District 25: Democrats >99%District 26, not up in 2026District 27: Democrats >99%District 28, not up in 2026District 29: Democrats >99%District 30: Democrats 57%District 31: Democrats >99%District 32: Democrats >99%District 33, not up in 2026District 34: Democrats >99%District 35: Democrats <1%13456789131415161721232427283035
Safe DLean DToss upLean RSafe RNot up in 2026

District shapes are estimated from where each district's voters live in the precinct returns, not drawn from the official boundary files.

Pick a district

Hover the map for the odds in any district. Click one to pin it here and find it in the table below.

Every seat

Average 23 D to 12 R
Not on the 2026 ballotNot on the 2026 ballotNot on the 2026 ballotNot on the 2026 ballotNot on the 2026 ballotNot on the 2026 ballotNot on the 2026 ballotNot on the 2026 ballotDistrict 17: Democrats win >99%District 22: Democrats win >99%District 25: Democrats win >99%District 29: Democrats win >99%District 31: Democrats win >99%District 32: Democrats win >99%District 34: Democrats win >99%District 20: Democrats win >99%District 24: Democrats win >99%District 27: Democrats win >99%District 8: Democrats win >99%District 21: Democrats win 99%District 11: Democrats win 97%District 3: Democrats win 93%District 15: Democrats win 90%District 30: Democrats win 57%District 4: Democrats win 1%District 9: Democrats win <1%District 1: Democrats win <1%District 7: Democrats win <1%District 35: Democrats win <1%Not on the 2026 ballotNot on the 2026 ballotNot on the 2026 ballotNot on the 2026 ballotNot on the 2026 ballotNot on the 2026 ballot
Safe DLean DToss upLean RSafe RNot up
Democratic seats across 2,000 simulations
18 for a majority1617182328

Every Senate district

DistrictLast winner2026 nominees2024 leanForecastDem winRating
30Kevin Van Winkle 2022Kevin Leung vs John CarsonR +0.0D +1.457%Toss up
15Janice Marchman 2022Janice Marchman vs Rob WoodwardD +4.8D +8.790%Likely D
3Nick Hinrichsen 2022Aaron Gutierrez vs Dana CharlesD +3.5D +10.293%Likely D
How this is built
Each district starts from its 2024 presidential vote, read off the precincts that voted in it, and moves with the state's 2026 House forecast and the national generic ballot. Half of what the last legislative winner ran ahead of the district carries over, 2026 primary turnout moves districts where it is posted, and district and statewide legislative polls count by recency and sample. A seat with no candidate from one party is called for the other. 2,000 simulations share a national, a state and a district shock. The map's district shapes are estimated from where each district's voters are in the precinct returns. All chambers.