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FORECAST55 DAYS OUT
Race polling · GOV-IA

Iowa Governor polls

Rob Sand (D) vs Zach Lahn (R). The polls the model aggregates, each with its weight and source, then every public poll on file. The forecast itself lives on the race page.

Adjusted aggregateD+3.7same figure as the race page
Polls88 recorded polls · 7 eligible for the aggregate · 7 with positive weight
Latest field dateSep 1Eligible polls: latest poll: 2026-09-01 (8 days old)
EditionSep 9weights and corrections as of this edition

The polls the model reads

hover, tap or Tab to any poll
last 30 daysR+5EVEND+5D+10Nov ’25Jan ’26MarMayJulSep
  • counted poll · area is its model weight
  • weight exactly zero · shown, not counted
  • trailing 30-day average
  • published average
  • 30 days before this edition

Every poll on file · 13

newest first

9 in the aggregate · 4 shown, not counted

PollsterFieldedSampleResultWeightSource
●Emerson CollegeGeneral750 LVRob Sand 48.64Zach Lahn 45.52Don't know 5.84+1 other release0.598Poll release
●Wedgewood PollsGeneral600 LVRob Sand 51Zach Lahn 46Don't know 3+1 other release0.383Poll document
●Suffolk UniversityGeneral500 LVRob Sand 47.8Zach Lahn 43.6Don't know 8.6+1 other release0.378Poll release
●Emerson CollegeGeneral712 LVRob Sand 48.4Zach Lahn 42.69Don't know 6.49Someone else 2.44+1 other release0.231Poll release
●Beacon Research/Shaw & Company ResearchGeneral1,003 RVRob Sand 53Zach Lahn 44Don't know 3Would not vote 0Someone else 00.075News coverage
●The New York Times/Siena CollegeGeneral600 LVRob Sand 48.19Zach Lahn 46.54Don't know 5.12Someone else 0.150.063News coverage
●CygnalGeneral · REP sponsor · REP partisan600 LVRob Sand 47.7Zach Lahn 43.4Don't know 8.9+1 other release0.050Poll release
Global Strategy GroupGeneral · DEM sponsor · DEM partisan— LVRob Sand 50Zach Lahn 41not in the aggregatePollster post
Echelon InsightsGeneral377 LVRob Sand 51Randy Feenstra 39Don't know 10+1 other releasenot in the aggregatePoll release
GBAOGeneral · DEM sponsor · DEM partisan1,200 LVRob Sand 50Randy Feenstra 42+1 other releasenot in the aggregateNews coverage
●Beacon Research/Shaw & Co. ResearchGeneral · Governor1,003 RVRob Sand 53Zach Lahn 440.075News coverage
The New York Times/Siena CollegeGeneral · Governor600 LVRob Sand 48Zach Lahn 47not in the aggregateNews coverage

Archive source date 2026-09-09 · bundled copy. Archive records may be newer than the sealed forecast; inclusion here does not mean the forecast uses them.

Model rows carry what the source record provides: pollster, field dates, sample size and D/R shares where published. Archive rows come from the broad public harvest. Poll data via VoteHub, used under CC BY 4.0. Poll data from The New York Times, used under CC BY 4.0.