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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

Platner +11

Susan Collins 38% · Graham Platner 49%

Field dates
Feb 12–Feb 16, 2026
Sample
1,105 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Mills +1

Susan Collins 40% · Janet Mills 41%

Field dates
Feb 12–Feb 16, 2026
Sample
1,097 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Healey +29

Maura Healey 56% · Mike Minogue 27%

Field dates
Feb 12–Feb 16, 2026
Sample
620 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Markey +29

Ed Markey 56% · John Deaton 27%

Field dates
Feb 12–Feb 16, 2026
Sample
616 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
House

HOU-ME-02

LePage +1

Matt Dunlap 46% · Paul LePage 47%

Field dates
Feb 12–Feb 16, 2026
Sample
522 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Healey +30

Maura Healey 58% · Brian Shortsleeve 28%

Field dates
Feb 12–Feb 16, 2026
Sample
620 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
House

HOU-ME-02

LePage +1

Matt Dunlap 46% · Paul LePage 47%

Field dates
Feb 12–Feb 16, 2026
Sample
521 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Healey +27

Maura Healey 55% · Mike Kennealy 28%

Field dates
Feb 12–Feb 16, 2026
Sample
620 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
House

HOU-ME-02

LePage +4

Jordan Wood 44% · Paul LePage 48%

Field dates
Feb 12–Feb 16, 2026
Sample
521 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Pappas +5

Chris Pappas 50% · John Sununu 45%

Field dates
Jan 15–Jan 19, 2026
Sample
2,038 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Ayotte +11

Kelly Ayotte 50% · Jon Kiper 39%

Field dates
Jan 15–Jan 19, 2026
Sample
2,031 LV
Sponsor / client
Not reported in archive
Partisan sponsorship
No partisan sponsorship flag
Pappas +6

Chris Pappas 49% · John Sununu 43%

Field dates
Sep 17–Sep 23, 2025
Sample
1,225 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.