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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

Scott +16

Phil Scott 41% · Ally Richards 25%

Field dates
Jun 18–Jun 23, 2026
Sample
511 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Healy +18

Maura Healy 50% · Brian Shortsleeve 32%

Field dates
Jun 18–Jun 23, 2026
Sample
623 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Ayotte +5

Kelly Ayotte 44% · Cinde Warmington 39%

Field dates
Jun 18–Jun 23, 2026
Sample
Not reported
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Platner +9

Graham Platner 51% · Susan Collins 42%

Field dates
May 21–May 25, 2026
Sample
1,280 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Pappas +7

Chris Pappas 49% · John Sununu 42%

Field dates
Apr 17–Apr 21, 2026
Sample
1,295 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Ayotte +8

Kelly Ayotte 47% · Cindy Warmington 39%

Field dates
Apr 17–Apr 21, 2026
Sample
1,117 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Moulton +31

Seth Moulton 56% · John Deaton 25%

Field dates
Apr 16–Apr 20, 2026
Sample
600 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Healey +22

Maura Healey 51% · Brian Shortsleeve 29%

Field dates
Apr 16–Apr 20, 2026
Sample
603 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Markey +23

Ed Markey 55% · John Deaton 32%

Field dates
Apr 16–Apr 20, 2026
Sample
603 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Healey +20

Maura Healey 52% · Mike Minogue 32%

Field dates
Apr 16–Apr 20, 2026
Sample
599 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Healey +21

Maura Healey 53% · Mike Kennealy 32%

Field dates
Apr 16–Apr 20, 2026
Sample
597 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Moulton +36

Seth Moulton 59% · John Deaton 23%

Field dates
Feb 12–Feb 16, 2026
Sample
611 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

50 shown · 116 total

CycleRaceTypeField endSamplePollResultError
20122012_House-G_NH-1House-G2012-11-033650D+3.8R+3.8
20122012_Gov-G_NHGov-G2012-11-03789D+9.0D+12.1R+3.1
20122012_Pres-G_NHPres-G2012-11-015020D+5.6R+5.6
20122012_Gov-G_NHGov-G2012-11-01502D+5.0D+12.1R+7.1
20122012_Sen-G_MASen-G2012-10-265830D+7.5R+7.5
20122012_Pres-G_MAPres-G2012-10-26583D+14.0D+23.2R+9.2
20122012_Pres-G_NHPres-G2012-10-19773D+9.0D+5.6D+3.4
20122012_House-G_NH-2House-G2012-10-19408D+3.0D+4.8R+1.8
20122012_House-G_NH-1House-G2012-10-19364R+3.0D+3.8R+6.8
20122012_Gov-G_NHGov-G2012-10-19773D+8.0D+12.1R+4.1
20102010_Sen-G_NHSen-G2010-10-29885R+18.0R+23.2D+5.2
20102010_House-G_NH-2House-G2010-10-29451D+3.0R+1.6D+4.6
20102010_House-G_NH-1House-G2010-10-29434R+7.0R+11.6D+4.6
20102010_Gov-G_NHGov-G2010-10-29885D+7.0D+7.6R+0.6
20102010_House-G_MA-4House-G2010-10-20385D+13.0D+10.5D+2.5
20102010_House-G_MA-10House-G2010-10-20349D+4.0D+4.5R+0.5
20102010_Gov-G_MAGov-G2010-10-20519D+4.0D+6.4R+2.4
20102010_Sen-GS_MASen-G2010-01-04554D+17.0R+4.8D+21.8
20082008_Sen-G_NHSen-G2008-11-01816D+6.0D+6.3R+0.3
20082008_Pres-G_NHPres-G2008-11-01812D+11.0D+9.6D+1.4
20082008_House-G_NH-2House-G2008-11-01404D+21.0D+15.0D+6.0
20082008_House-G_NH-1House-G2008-11-01413D+5.0D+5.9R+0.9
20082008_Gov-G_NHGov-G2008-11-01831D+47.0D+42.6D+4.4
20082008_Sen-G_NHSen-G2008-10-28687D+5.0D+6.3R+1.3
20082008_Pres-G_NHPres-G2008-10-28692D+16.0D+9.6D+6.4
20082008_House-G_NH-2House-G2008-10-28303D+28.0D+15.0D+13.0
20082008_House-G_NH-1House-G2008-10-28308D+3.0D+5.9R+2.9
20082008_Gov-G_NHGov-G2008-10-28619D+51.0D+42.6D+8.4
20082008_Sen-G_NHSen-G2008-10-25687D+11.0D+6.3D+4.7
20082008_Pres-G_NHPres-G2008-10-25692D+16.0D+9.6D+6.4
20082008_House-G_NH-2House-G2008-10-25344D+22.0D+15.0D+7.0
20082008_House-G_NH-1House-G2008-10-25341D+8.0D+5.9D+2.1
20082008_Gov-G_NHGov-G2008-10-25698D+50.0D+42.6D+7.4
20082008_Sen-G_NHSen-G2008-10-20725D+13.0D+6.3D+6.7
20082008_Pres-G_NHPres-G2008-10-20725D+15.0D+9.6D+5.4
20082008_House-G_NH-2House-G2008-10-20349D+26.0D+15.0D+11.0
20082008_House-G_NH-1House-G2008-10-20358D+5.0D+5.9R+0.9
20082008_Gov-G_NHGov-G2008-10-20725D+50.0D+42.6D+7.4
20062006_House-G_NH-2House-G2006-11-04304D+4.5D+7.1R+2.6
20062006_House-G_NH-1House-G2006-11-04331R+9.0D+2.6R+11.6
20062006_Gov-G_NHGov-G2006-11-04641D+56.0D+48.3D+7.7
20062006_House-G_NH-2House-G2006-10-313200D+7.1R+7.1
20062006_House-G_NH-1House-G2006-10-31340R+5.0D+2.6R+7.6
20062006_Gov-G_NHGov-G2006-10-31663D+52.0D+48.3D+3.7
20062006_Sen-G_MASen-G2006-10-24585D+41.0D+38.8D+2.2
20062006_Gov-G_MAGov-G2006-10-24585D+25.0D+20.3D+4.7
20042004_Sen-G_NHSen-G2004-10-30957R+36.0R+32.5R+3.5
20042004_Pres-G_NHPres-G2004-10-30963D+1.0D+1.4R+0.4
20042004_House-G_NH-2House-G2004-10-30464R+18.0R+20.1D+2.1
20042004_House-G_NH-1House-G2004-10-30492R+19.0R+26.8D+7.8

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.