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Pollster file

University of New Hampshire Survey Center

Historical accuracy is measured against certified results. Current-cycle records come from the canonical, deduplicated archive and do not by themselves change the sealed forecast.

Historical polls
116
Mean absolute error
5.93percentage points
Historical bias
D+2.31
Represented cycles
132000–2022
Current archive
156canonical records
History span
Nov 3, 2000through Nov 4, 2022
Identity

Known names and relationships

Known aliases
University of New Hampshire
Organization type
Single canonical organization
Cycles represented
2000 · 2002 · 2004 · 2006 · 2008 · 2010 · 2012 · 2013 · 2014 · 2016 · 2018 · 2020 · 2022

116 eligible historical polls across 13 represented cycles passed the published history identity checks. Historical bias is descriptive and is kept separate from sponsor or client affiliation.

Canonical 2025–2026 archive

Current-cycle records

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.

12 shown · 156 total

Markey +19

Ed Markey 49% · John Deaton 30% · Joe Tache 7%

Field dates
Aug 20–Aug 24, 2026
Sample
881 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Reed +20

Jack Reed 51% · Raymond McKay 31% · Michael Bahry 2%

Field dates
Aug 20–Aug 24, 2026
Sample
750 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Ayotte +10

Kelly Ayotte 49% · Cinde Warmington 39%

Field dates
Aug 20–Aug 24, 2026
Sample
1,878 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Moulton +13

Seth Moulton 38% · John Deaton 25% · Joe Tache 16%

Field dates
Aug 20–Aug 24, 2026
Sample
881 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Healy +24

Maura Healy 54% · Michael Minogue 30%

Field dates
Aug 20–Aug 24, 2026
Sample
881 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Lamont +15

Ned Lamont 52% · Ryan Fazio 37%

Field dates
Aug 20–Aug 24, 2026
Sample
809 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Foulkes +22

Helena Foulkes 42% · Ken Block 18% · Elaine Pelino 20% · Jasjit Gotra 1% · CD Reynolds 1%

Field dates
Aug 20–Aug 24, 2026
Sample
750 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Sununu +2

Chris Pappas 43% · John Sununu 45%

Field dates
Aug 20–Aug 24, 2026
Sample
1,878 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Pappas +5

Chris Pappas 45% · Scott Brown 40%

Field dates
Aug 20–Aug 24, 2026
Sample
1,878 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Pingree +14

Hannah Pingree 49% · Bobby Charles 35% · Rick Bennett 6%

Field dates
Jul 15–Jul 20, 2026
Sample
1,178 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Jackson +3

Troy Jackson 49% · Susan Collins 46%

Field dates
Jul 15–Jul 20, 2026
Sample
1,178 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Scott +11

Phil Scott 44% · Amanda Janoo 33% · June Goodband 2%

Field dates
Jul 15–Jul 20, 2026
Sample
954 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
See this pollster in the Full Poll Archive →
Certified-result history

Eligible historical observations

16 shown · 116 total

CycleRaceTypeField endSamplePollResultError
20042004_Gov-G_NHGov-G2004-10-30957R+1.0D+2.1R+3.1
20042004_Sen-G_NHSen-G2004-10-26758R+39.0R+32.5R+6.5
20042004_Pres-G_NHPres-G2004-10-26758D+4.0D+1.4D+2.6
20042004_House-G_NH-2House-G2004-10-26346R+27.0R+20.1R+6.9
20042004_House-G_NH-1House-G2004-10-26383R+34.0R+26.8R+7.2
20042004_Gov-G_NHGov-G2004-10-26758R+3.0D+2.1R+5.2
20022002_Sen-G_NHSen-G2002-11-01644R+1.0R+4.4D+3.4
20022002_House-G_NH-2House-G2002-11-01335R+30.0R+16.0R+14.0
20022002_House-G_NH-1House-G2002-11-01305R+6.0R+19.6D+13.6
20022002_Gov-G_NHGov-G2002-11-01642R+14.0R+20.4D+6.5
20022002_Sen-G_NHSen-G2002-10-26648D+4.0R+4.4D+8.4
20022002_House-G_NH-2House-G2002-10-26309R+6.0R+16.0D+10.0
20022002_House-G_NH-1House-G2002-10-26316R+18.0R+19.6D+1.6
20022002_Gov-G_NHGov-G2002-10-26651R+12.0R+20.4D+8.4
20002000_Pres-G_NHPres-G2000-11-03801R+6.0R+1.3R+4.7
20002000_Gov-G_NHGov-G2000-11-03801D+6.0D+5.0D+1.0

Method · historical final-three-week D/R general-election rows plus verified historical supplement; min n=5

Definition · bias_D is poll D-R margin minus actual D-R margin; positive overstates Democrats.

A missing sample, sponsor or source is labeled unavailable; it is never reconstructed.

Poll data via VoteHub, used under CC BY 4.0. Poll data from The New York Times, used under CC BY 4.0.