Colorado
Governor
Open seat
Forecast as of November 1, 2026. Every share and vote figure on this page is that forecast, added up from the counties below. Not a poll average, not ballots cast, and not an official result.
Why this race matters
This is the 19th closest governor race in the forecast, 13.7 points, out of 36.
36 governor races are in the forecast (19 Democratic leads, 17 Republican leads). A governor's race does not decide control of Congress.
No incumbent is on the ballot.
No earlier forecast of this race is archived, so there is no previous projection, date, or reason to show.
History block in the model: D+13.4. That is the office blend, not one past election.
Last same-office result in the candidate file: 2022 D+19.3. A special on the 2026 ballot is not automatically that contest.
The polling block for this race was omitted.
Counties
Projected vote by county. Tap a county to open its precincts.
Drawing the counties.
DPhil Weiser, DPhil Weiser
Democratic
RVictor Marx, RVictor Marx
Republican
Other
Margin
D+13.7
Win probability
96.4%
80% interval
D+23.4 to D+3.9
95% interval
D+28.5 to R+1.3
Market
97%
Phil Weiser · win probability, not a vote shareRaw data Checking polls.
No live poll enters this race, so the band is the wider fundamentals interval from 50,000 draws. The thin mark is the 95% interval. The thick mark is the 80%. The hairline is zero. 2,525,062 projected votes, equal to the table. Not ballots cast.
Counties
Every reporting unit in the race. Tap a county to open its precincts. The projected votes above are this table added up. They are not ballots cast.
| Party | |||||
|---|---|---|---|---|---|
| El Paso County | RVictor Marx, RVictor Marx | R | R+9.2 | 53.3% | 304,078 |
| Denver County | DPhil Weiser, DPhil Weiser | D | D+60.0 | 78.7% | 289,916 |
| Jefferson County | DPhil Weiser, DPhil Weiser | D | D+20.1 | 58.7% | 288,660 |
| Arapahoe County | DPhil Weiser, DPhil Weiser | D | D+22.4 | 59.9% | 259,872 |
| Douglas County | RVictor Marx, RVictor Marx | R | R+6.7 | 52.0% | 194,640 |
| Adams County | DPhil Weiser, DPhil Weiser | D | D+14.3 | 55.8% | 186,319 |
| Larimer County | DPhil Weiser, DPhil Weiser | D | D+18.2 | 57.8% | 180,047 |
| Boulder County | DPhil Weiser, DPhil Weiser | D | D+57.5 | 77.4% | 156,625 |
| Weld County | RVictor Marx, RVictor Marx | R | R+19.0 | 58.2% | 143,613 |
| Mesa County | RVictor Marx, RVictor Marx | R | R+20.9 | 59.1% | 73,142 |
| Pueblo County | DPhil Weiser, DPhil Weiser | D | D+3.1 | 50.2% | 67,958 |
| Broomfield County | DPhil Weiser, DPhil Weiser | D | D+29.3 | 63.3% | 37,384 |
| La Plata County | DPhil Weiser, DPhil Weiser | D | D+20.2 | 58.8% | 28,491 |
| Garfield County | DPhil Weiser, DPhil Weiser | D | D+5.4 | 51.4% | 24,252 |
| Eagle County | DPhil Weiser, DPhil Weiser | D | D+29.7 | 63.5% | 22,196 |
| Montrose County | RVictor Marx, RVictor Marx | R | R+30.6 | 63.9% | 20,456 |
| Fremont County | RVictor Marx, RVictor Marx | R | R+32.7 | 65.0% | 20,336 |
| Elbert County | RVictor Marx, RVictor Marx | R | R+49.4 | 73.4% | 16,303 |
| Delta County | RVictor Marx, RVictor Marx | R | R+31.4 | 64.4% | 15,552 |
| Summit County | DPhil Weiser, DPhil Weiser | D | D+40.5 | 68.9% | 14,008 |
| Routt County | DPhil Weiser, DPhil Weiser | D | D+29.7 | 63.5% | 13,043 |
| Teller County | RVictor Marx, RVictor Marx | R | R+32.1 | 64.7% | 13,036 |
| Montezuma County | RVictor Marx, RVictor Marx | R | R+18.2 | 57.8% | 12,086 |
| Chaffee County | DPhil Weiser, DPhil Weiser | D | D+13.2 | 55.2% | 11,511 |
| Morgan County | RVictor Marx, RVictor Marx | R | R+45.1 | 71.2% | 10,746 |
| Park County | RVictor Marx, RVictor Marx | R | R+14.1 | 55.7% | 9,617 |
| Pitkin County | DPhil Weiser, DPhil Weiser | D | D+50.5 | 73.9% | 8,917 |
| Gunnison County | DPhil Weiser, DPhil Weiser | D | D+32.3 | 64.8% | 8,735 |
| Logan County | RVictor Marx, RVictor Marx | R | R+52.9 | 75.1% | 8,115 |
| Grand County | DPhil Weiser, DPhil Weiser | D | D+1.2 | 49.3% | 7,891 |
| Archuleta County | RVictor Marx, RVictor Marx | R | R+10.6 | 53.9% | 7,470 |
| Otero County | RVictor Marx, RVictor Marx | R | R+19.9 | 58.6% | 5,167 |
| Las Animas County | RVictor Marx, RVictor Marx | R | R+4.3 | 50.8% | 4,978 |
| Alamosa County | RVictor Marx, RVictor Marx | R | R+1.2 | 49.3% | 4,803 |
| Rio Grande County | RVictor Marx, RVictor Marx | R | R+16.5 | 56.9% | 3,957 |
| Clear Creek County | DPhil Weiser, DPhil Weiser | D | D+18.4 | 57.9% | 3,898 |
| Moffat County | RVictor Marx, RVictor Marx | R | R+60.2 | 78.7% | 3,862 |
| Prowers County | RVictor Marx, RVictor Marx | R | R+45.1 | 71.2% | 2,978 |
| Huerfano County | DPhil Weiser, DPhil Weiser | D | D+1.2 | 49.2% | 2,835 |
| San Miguel County | DPhil Weiser, DPhil Weiser | D | D+53.4 | 75.4% | 2,781 |
| Yuma County | RVictor Marx, RVictor Marx | R | R+62.8 | 80.1% | 2,700 |
| Gilpin County | DPhil Weiser, DPhil Weiser | D | D+15.7 | 56.5% | 2,638 |
| Conejos County | RVictor Marx, RVictor Marx | R | R+8.7 | 53.0% | 2,622 |
| Ouray County | DPhil Weiser, DPhil Weiser | D | D+23.4 | 60.3% | 2,373 |
| Lake County | DPhil Weiser, DPhil Weiser | D | D+23.0 | 60.2% | 2,264 |
| Custer County | RVictor Marx, RVictor Marx | R | R+32.7 | 65.0% | 2,239 |
| Saguache County | DPhil Weiser, DPhil Weiser | D | D+12.6 | 55.0% | 2,172 |
| Kit Carson County | RVictor Marx, RVictor Marx | R | R+65.0 | 81.2% | 2,141 |
| Rio Blanco County | RVictor Marx, RVictor Marx | R | R+63.0 | 80.1% | 2,136 |
| Washington County | RVictor Marx, RVictor Marx | R | R+71.9 | 84.6% | 1,624 |
| Lincoln County | RVictor Marx, RVictor Marx | R | R+61.0 | 79.2% | 1,488 |
| Phillips County | RVictor Marx, RVictor Marx | R | R+59.3 | 78.3% | 1,362 |
| Bent County | RVictor Marx, RVictor Marx | R | R+30.6 | 64.0% | 1,268 |
| Costilla County | DPhil Weiser, DPhil Weiser | D | D+25.9 | 61.6% | 1,204 |
| Baca County | RVictor Marx, RVictor Marx | R | R+59.9 | 78.6% | 1,160 |
| Crowley County | RVictor Marx, RVictor Marx | R | R+39.5 | 68.4% | 987 |
| Dolores County | RVictor Marx, RVictor Marx | R | R+46.4 | 71.9% | 821 |
| Sedgwick County | RVictor Marx, RVictor Marx | R | R+49.3 | 73.3% | 787 |
| Cheyenne County | RVictor Marx, RVictor Marx | R | R+72.8 | 85.1% | 611 |
| Kiowa County | RVictor Marx, RVictor Marx | R | R+69.0 | 83.2% | 500 |
| Jackson County | RVictor Marx, RVictor Marx | R | R+53.8 | 75.6% | 483 |
| Mineral County | RVictor Marx, RVictor Marx | R | R+9.6 | 53.4% | 481 |
| Hinsdale County | RVictor Marx, RVictor Marx | R | R+9.6 | 53.5% | 387 |
| San Juan County | DPhil Weiser, DPhil Weiser | D | D+33.2 | 65.3% | 340 |
Model
- Raw data
2024 presidential baseline
National R−D 1.5County presidential file. Not the 2026 result.
- Raw data
Generic ballot
D 51.7 R 43.1 R−D -8.6National Wikipedia aggregate, 2026-10-30. State generic ballots, where a public poll exists, are mixed with the national swing for a race that does not have its own poll: ME, MI, NH, NY, OH. A state with no generic-ballot poll keeps the national swing and is not assigned a neighbor's.
- Raw data
Party identification
Pew D+5 and Gallup D+10, blend R−D -7.3Pew NPORS 2026, identifiers plus leaners: Republican 43, Democratic 48. Gallup party identification plus leaners, first two quarters of 2026: Democratic 49, Republican 39. Pew is 55% of this blend and Gallup is 45%.
- Model input
National block
R−D -8.160% generic ballot and 40% party identification. The swing versus the 2024 presidential margin is what gets transmitted.
- Model input
Swing transmitted
0.40 × -10.1 = -4.0No state generic-ballot poll. The generic ballot is R−D -8.6, a swing of -10.1 from the 2024 presidential margin. A race without its own poll uses that swing, not the 60/40 block. This state is not given another state's number.
- Model input
History block
R−D -13.3Weights 2018 5 / 2024 35 / 2020 20 / 2022 16. If that office was on the ballot in 2022, that year takes the 40 and 2018 takes the 5. Otherwise 2018 keeps the 40. A missing year is filled with the 2020 result for the same office. Another office is not used. The year lines are El Paso County, the largest county, not the state total: 2018 R+16.6 w5, 2022 open seat R+7.4 w16. No incumbent is on the ballot, so the 2022 result keeps 40 percent of its usual weight and 40 percent of its gap versus the 2024 presidential margin. The prior nominee's margin is not the open-seat baseline. The state number above is the vote-weighted sum. A 2024 county map is not copied forward unchanged.
- Model input
Electorate block
R−D -16.9History reweighted by usual midterm turnout, plus half of the transmitted swing. Rural and presidential-only counties still move farther when the result is spread back to counties. That spread is ballot size, not the demographic file. Published ballots are the 2018 midterm canvass for this office, split by these modeled shares. They are not the 2024 presidential vote. The 2026 early-vote count is not inside this margin.
- Model input
Turnout block
R−D -14.8Each county is weighted by its 2018 ballots divided by its 2024 presidential ballots. Small counties shrink halfway toward the state median. 2020 mail shares are not used.
- Model input
National environment
R−D -17.3History plus the full transmitted swing. With no poll of this race, that swing is the state generic ballot mixed with the national block, or the national block alone.
- Model input
State environment
R−D -15.1History plus 45 percent of the transmitted swing. This is a Senate and governor weight.
- Model input
State partisan lean
R−D -11.0The 2024 presidential margin of this state, or of this district for a House race. It is heavier than the old state-environment block and is not shrunk toward the polling term.
- Model input
Trump popularity
R−D -12.5New York Times approval average, October 29, 2026: 37.4% approve, 60.2% disapprove. Net approval -22.800000000000004. That is not a vote share. Four-tenths of the net is a margin, then scaled by this place's partisan lean (factor 1.37), so an unpopular president costs more in a Democratic state.
- Model input
Candidate favorability
R−D 0.0Open seat or no incumbent. Favorability is zero.
- Model input
Demographics
R−D -18.6One statewide block only. A county that is more college-educated or more nonwhite than the other counties in this race takes more of the transmitted swing, and a more rural county takes less. That changes this block, at its weight. It does not choose which counties move when the margin is spread back out. That spread uses ballot size. The shares are the 2012–2016 American Community Survey and the 2010 Census, from the 2018 county election-context file. Alaska is not in that file.
- Model input
Finance
R−D -13.3No sourced spending edge. The block is history, or history shrunk toward the poll. It is not a finance model.
- Model input
Issues
R−D -13.3No sourced issue score. Same treatment as finance. It is not a separate issue model.
- Model input
Polling
OmittedNo public poll. Rated from the generic congressional ballot, R−D -8.6. No state generic-ballot poll. The generic ballot is R−D -8.6, a swing of -10.1 from the 2024 presidential margin. A race without its own poll uses that swing, not the 60/40 block. This state is not given another state's number. There is no public poll, so there is no undecided line to split. Banned individual rows excluded: 0. One same-office miss, 2022: the poll was R−D -11.7 and the result was -19.3, miss -7.6. A single cycle is noisy, so 40 percent is kept. Capped at 2.5 points. It is added to the polling term only. It is not a separate weight. Applied to the polling term: -2.50. Public pollsters: 0. Outliers: 0. Recency half-life 16 days. Sample weight n/(n+350). A registered-voter poll is 0.90. An internal poll, or a poll sponsored by one party, is weighted 0. It is not in the average. An internal-only file is dropped. A poll that names both parties is not an internal. A poll more than 8 points from the median of the others is cut in half. Pollster quality nudges that weight by only a few percent. The same rule is used on a House poll. House district polls are likely-voter polls only.
- Model input
Generic ballot weight
R−D -17.3This race has no independent poll, so the generic ballot is already the environment swing. It is not added a second time.
- Model input
Top line
Not a House termSenate and governor are the top line. They are not moved by themselves.
- Model input
Candidate
R+0.00 added wholeOpen seat. No incumbency term. A negative popularity score is not added on top of the office baseline. No overperformance. An open seat, a scandal, or a missing incumbent gets none. These points are not watered down to the candidate weight. The candidate weight is a separate slice of the baseline. On a Senate or governor race with three public polls and no outlier, the points stop at that poll instead of moving past it.
- Model input
Scandal
NoneNo candidate on this ballot is scandal-defined.
- Model input
Endorsements
NoneNo sourced endorsement on this ballot.
- Model input
Halfway floor
Not appliedNot applied. The state's 2024 presidential margin was inside 10 points, or there is no polling term.
- Model input
Pooling
No poll to shrink towardOtherwise the shrink is 35%.
- Model input
Prediction market
97% win probabilityPhil Weiser 96.7% is a win probability, not a vote share. Republican win probability 3.3 from Kalshi 3.6% Republican; Polymarket 3.0% Republican. A price of 50 is a tie. Each point above 50 is 0.35 margin points, capped at 12, so the raw margin is -12.0. That margin is shrunk 40% toward the pre-market margin -11.7, which leaves -11.9. It enters once, at 5.0%. The polling term is not nudged. Books under $10,000 and primary markets are ignored.
- Model input
State bend
NoneNot applied.
- Model input
State environment adjustment
R−D -1.5The 2022 statewide margin was R−D -19.3 and the 2024 presidential margin was R−D -11.0. The country moved 1.4 from that presidential vote to the 2022 House vote. Fifteen percent of the difference is kept, capped at 1.5, so the state environment is -1.5 on top of the national swing.
- Model input
Early vote
D+0.6Reported party on ballots already cast is D 31.9 R 24.6, a Democratic lead of 7.3 points of every ballot. At 6 days before the 2022 election that lead was 3.4. The difference is D+3.9. Fifteen percent is kept, capped at 1, so D+0.6. This is registration on the ballots returned so far, compared with the same point in the last midterm, not a count of how anyone voted and not another model's estimate of the electorate. The four age groups on the file, youngest to oldest, are 4.9%, 14.1%, 37.7%, and 43.2%. That is the state's own report of who has voted. It is read next to the county demographics already in the model. It is not a second early-vote point, and it is not another model's estimate of the electorate.
- Model input
Other ratings
R−D -11.3 at 3.0%Cook, Sabato, Inside Elections, and the other columns on the same published tables (Decision Desk HQ, RealClearPolitics, Split Ticket, FiftyPlusOne, The Economist, Fox News, Silver Bulletin). 7 ratings, average R−D -11.3. A toss-up is 0, tilt 1.5, lean 3.5, likely 7, safe or solid 12. If this race is already further to that side, the rating does not pull it back. Mixed in after everything else, at 3.0 percent. It does not replace the poll. A seat nobody has rated is left alone.
- Model input
Weights
stateLean 18.4% · trump 13.8% · favorability 12.7% · history 9.4% · candidate 9.2% · electorate 5.7% · stateEnv 5.7% · national 5.7% · turnout 3.4% · demographics 3.4% · finance 2.3% · issues 2.4% · market 4.9% · ratings 3.0%History is lighter. State partisan lean, Trump popularity, and candidate favorability are their own terms. A market, when it qualifies, scales every other weight and is not taken out of polling alone. Published ratings, when a race has them, are mixed in after that. They are not taken out of polling alone.
County-sum margin
-13.7This is the sum of the county projections. Counties are not moved afterward to force this total.
Minor parties
NoneOther is the 2024 presidential vote that was neither Democratic nor Republican, weighted by these counties. It is not the last forecast. A missing opponent is not Other. No Libertarian, Green, Constitution, or other minor line was on this ballot.
80% interval
-23.4 to -3.910th to 90th percentile of 50,000 draws. Poll, national, state, turnout, and candidate error.
95% interval
-28.5 to 1.32.5th to 97.5th percentile. Senate and governor state errors in the same state share a correlation of 0.30. The band shown is the marginal interval.
Wikipedia, 2026 United States gubernatorial elections (general-election infobox) coloradosun.com/2025/01/02/phil-weiser-colorado-governor-2026/}}</ref>