2026 forecast ยท Oregon Senate

Jeff Merkley is all but certain to win Oregon's Senate seat.

Jeff Merkley vs David Brock Smith. The model has Merkley ahead by 30.9 points, winning 100 percent of 2,000 simulated elections.

Safe DModel D +30.9Updated October 22, 2026
Jeff Merkley
Democrat
63.7%
1,309,453 projected votes
David Brock Smith
Republican
32.8%
673,349 projected votes
100%Merkley
0%Smith
Merkley all but certainEach square is one simulated election night, Merkley wins about 100 of 100
RatingSafe D100% chance for Merkley
Model marginD +30.9No polls in the race
80 percent rangeD +39.4 to D +22.42,000 simulations
Projected votes2,055,143Merkley 63.7%

The county map

Four ways to read the state: margin, shift from 2024, vote bubbles and turnout

Oregon Senate by county

Baker CountyBenton CountyClackamas CountyClatsop CountyColumbia CountyCoos CountyCrook CountyCurry CountyDeschutes CountyDouglas CountyGilliam CountyGrant CountyHarney CountyHood River CountyJackson CountyJefferson CountyJosephine CountyKlamath CountyLake CountyLane CountyLincoln CountyLinn CountyMalheur CountyMarion CountyMorrow CountyMultnomah CountyPolk CountySherman CountyTillamook CountyUmatilla CountyUnion CountyWallowa CountyWasco CountyWashington CountyWheeler CountyYamhill CountyMultnomahClackamasLaneMarionDeschutesJacksonLinnDouglasYamhillBentonJosephinePolk
D +40R +40Click a county to zoom ยท arrow keys step through counties by size
Where the margin is won
Multnomah County: Merkley +290,650Washington County: Merkley +140,402Lane County: Merkley +81,323Clackamas County: Merkley +62,099Deschutes County: Merkley +33,140Benton County: Merkley +24,678Marion County: Merkley +19,827Jackson County: Merkley +18,942Lincoln County: Merkley +10,395Clatsop County: Merkley +6,058Hood River County: Merkley +5,520Polk County: Merkley +4,696Yamhill County: Merkley +4,083Tillamook County: Merkley +2,046Wasco County: Merkley +1,505Douglas County: Smith +14,879Klamath County: Smith +10,078Linn County: Smith +8,617Umatilla County: Smith +5,915Josephine County: Smith +5,274Crook County: Smith +4,923Malheur County: Smith +3,826Union County: Smith +3,781Baker County: Smith +3,581Lake County: Smith +2,198Jefferson County: Smith +2,173Grant County: Smith +1,980Harney County: Smith +1,969Coos County: Smith +1,715Morrow County: Smith +1,316Wallowa County: Smith +924Curry County: Smith +654Columbia County: Smith +513Sherman County: Smith +465Wheeler County: Smith +300Gilliam County: Smith +287
Merkley +705,364 net votes from 15 countiesStatewide D +30.7, a 629,996 vote marginSmith +75,368 net votes from 21 counties

Vote share

Each candidate's projected share and the range of 80 percent of simulations

Jeff MerkleyDemocrat ยท 100% to win
63.7%
David Brock SmithRepublican ยท 0% to win
32.8%

Scale runs from 25 to 75 percent. The dot is the forecast, the band is the 80 percent range and the brighter tick marks 50 percent.

Projected statewide vote

2,055,143 votes
CandidateVotesShare
Jeff Merkley D1,309,45363.7%
David Brock Smith R673,34932.8%
Gary Dye L37,8151.8%
Brett Smith G34,7321.7%
Total2,055,143100%

Each candidate's expected vote in the On Point simulation, at the forecast's projected turnout.

Every simulated outcome

2,000 sims
D +52.0: 3 simulationsD +50.7: 2 simulationsD +49.4: 0 simulationsD +48.2: 11 simulationsD +46.9: 16 simulationsD +45.6: 15 simulationsD +44.3: 18 simulationsD +43.1: 21 simulationsD +41.8: 32 simulationsD +40.5: 56 simulationsD +39.2: 72 simulationsD +38.0: 97 simulationsD +36.7: 94 simulationsD +35.4: 114 simulationsD +34.1: 150 simulationsD +32.9: 153 simulationsD +31.6: 161 simulationsD +30.3: 145 simulationsD +29.0: 155 simulationsD +27.8: 142 simulationsD +26.5: 113 simulationsD +25.2: 93 simulationsD +23.9: 88 simulationsD +22.7: 68 simulationsD +21.4: 52 simulationsD +20.1: 38 simulationsD +18.8: 27 simulationsD +17.6: 20 simulationsD +16.3: 16 simulationsD +15.0: 9 simulationsD +13.7: 6 simulationsD +12.5: 3 simulationsD +11.2: 2 simulationsD +9.9: 1 simulationsD +8.6: 3 simulationsD +7.4: 3 simulationsD +6.1: 0 simulationsD +4.8: 0 simulationsD +3.5: 0 simulationsD +2.3: 1 simulationsD +52.6D +1.6

80 percent of simulations fall between D +39.4 and D +22.4. Negative margins are Democratic wins.

The trend

Each side's chance of winning over the forecast's recent updates

0%25%50%75%100%100% Merkley0% Smith14 updates agoToday

Polling

Every poll in the average, and how the model reads it

Polls of the race

PollsterSampleAgeMargin
On Point averageWeighted averageNo polls

Each margin is the poll as the pollster published it. The forecast counts every poll after its house effect and the undecided split, which is what the trail above shows; hover a margin for the counted value. Lean R and Lean D mark partisan leaning firms.

Model margin
Merkley +30.9
Chance of winning
Jeff Merkley100%
David Brock Smith0%
Simulated vote
Jeff Merkley63.7%
David Brock Smith32.8%
Gary Dye1.8%
Brett Smith1.7%
How the model gets there
Partisan leanD +14.8
FundamentalsD +33.2
With pollsD +28.3
Early vote turnoutD +2.6
With early voteD +30.9

Read from 155,137 ballots cast so far in Oregon, against the party mix the forecast expected of them, with similar states and primary turnout. Early vote tracker

Who has endorsed

29 public endorsements in this race, each with where it was reported.

Jeff Merkley29
  • Willamette WeekPortland newspapersource
  • Oregon AFL-CIOState labor federationsource
  • League of Conservation VotersEnvironmental groupsource
  • Planned Parenthood Action FundReproductive rights groupsource
  • Our RevolutionProgressive groupsource
  • End Citizens UnitedCampaign finance reform PACsource
  • J Street PACPro Israel, pro peace PACsource
  • Peace ActionAnti war groupsource
Every endorsement on Watchdog

How we got here

From the state's partisan lean to the forecast, one stage at a time

D +40R +40Partisan leanthe state's baselineD +14.8Fundamentalsapproval, economy, candidatesD +33.2With pollsno pollsD +28.3With early voteturnout so farD +30.9

Who votes for whom

Estimated vote by group from the model's simulated electorate

Estimated vote by group

model crosstabs
GroupShareMerkleySmith
GenderMen46%57.738.7
Women54%66.430.1
Age18 to 2913%66.429.9
30 to 4424%63.233.2
45 to 6430%60.136.3
65+33%62.234.3
RaceWhite81%58.637.9
Black2%91.75.0
Latino8%72.524.0
Asian and other9%81.314.7
Race and genderWhite men36%52.244.3
White women45%63.832.7
Latino men4%69.926.6
Latino women4%75.121.4
All other races9%81.314.7

Every county

The projected vote in each county, largest first

Projected vote by county

36 counties
CountyMerkleySmithOtherTotalMargin
Statewide1,306,190676,19472,7592,055,143D +30.7
Multnomah County334,79044,14013,743392,673D +74.1
Washington County201,28260,8809,509271,671D +51.5
Clackamas County137,25775,1587,249219,664D +28.3
Lane County133,86152,5386,361192,760D +42.2
Marion County77,82758,0005,366141,193D +13.9
Deschutes County71,12837,9883,724112,840D +29.4
Jackson County62,87243,9303,874110,676D +17.2
Linn County26,72035,3372,78864,845R +13.2
Douglas County19,74534,6242,03156,400R +26.3
Yamhill County26,88922,8062,12551,820D +7.9
Benton County35,51010,8321,63147,973D +51.4
Josephine County18,78824,0621,97244,822R +11.8
Polk County23,19518,4991,51243,206D +10.9
Coos County15,12916,8441,22833,201R +5.2
Klamath County10,56020,6381,23232,430R +31.1
Umatilla County10,88616,80191528,602R +20.6
Columbia County13,16313,6761,26528,104R +1.9
Lincoln County18,3827,9871,04227,411D +38.0
Clatsop County13,2377,17974121,157D +28.6
Tillamook County8,2336,18750814,928D +13.7
Crook County4,6029,52551214,639R +33.6
Union County4,4928,27340913,174R +28.7
Curry County6,0196,67346013,152R +5.0
Wasco County6,5985,09344912,140D +12.4
Hood River County8,3172,79735611,470D +48.1
Jefferson County4,1166,28936610,771R +20.2
Malheur County3,1556,98134510,481R +36.5
Baker County2,5356,1162958,946R +40.0
Wallowa County1,7622,6861054,553R +20.4
Morrow County1,4352,7511614,347R +30.3
Grant County1,0303,0101254,165R +47.5
Lake County8653,0631264,054R +54.3
Harney County9482,9171283,993R +49.3
Sherman County265730421,037R +44.7
Gilliam County354641331,028R +27.7
Wheeler County24354331817R +36.5

Projected 2026 votes from the On Point simulation: each county's expected turnout times its simulated vote share. Totals may differ from the race total by rounding.

Methodology
Every county is rebuilt by simulating voters going to the polls, 2,000 times, from On Point Polling survey data, past results, and the polling average. How the model works.