UPDATED Mar. 13, 2023, at 3:53 PM

FiveThirtyEight’s Pollster Ratings

Based on the historical accuracy and methodology of each polling organization’s polls.

B-

University of New Hampshire Survey Center

Polls analyzed	129
Races called correctly	86%
Most recent cycle	2022
Affiliated with AAPOR/Roper	Yes
Other names

What are pollster ratings?

How accurate are the polls from University of New Hampshire Survey Center?

Polls conducted within 21 days of an election (based on the poll’s median date) are used to determine the pollster’s grade.

2022

Key

A = Adults

RV = Registered voters

V = Voters

LV = Likely voters

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Nov 2-6	1,027LV	House (NH-2) General election	Online	Poll Kuster +8.0	Actual Kuster +11.7	Difference 3.7
Nov 2-6	1,043LV	House (NH-1) General election	Online	Poll Pappas +1.0	Actual Pappas +8.1	Difference 7.1
Nov 2-6	433LV	House (ME-2) General election	Online	Poll Golden +1.0	Actual Golden +3.7	Difference 2.7
Nov 2-6	477LV	House (ME-1) General election	Online	Poll Pingree +19.0	Actual Pingree +25.9	Difference 6.9
Nov 2-6	2,077LV	Governor (NH) General election	Online	Poll Sununu +12.0	Actual Sununu +15.6	Difference 3.6
Nov 2-6	922LV	Governor (ME) General election	Online	Poll Mills +8.0	Actual Mills +13.2	Difference 5.2
Nov 2-6	2,077LV	Senate (NH) General election	Online	Poll Hassan +2.0	Actual Hassan +9.1	Difference 7.1

2020

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Oct 24-28	412LV	House (NH-2) General election	Online	Poll Kuster +10.0	Actual Kuster +10.2	Difference 0.2
Oct 24-28	451LV	House (NH-1) General election	Online	Poll Mowers +2.0	Actual Pappas +5.1	Difference 7.1
Oct 24-28	864LV	Governor (NH) General election	Online	Poll Sununu +24.0	Actual Sununu +31.8	Difference 7.8
Oct 24-28	864LV	Senate (NH) General election	Online	Poll Shaheen +11.0	Actual Shaheen +15.7	Difference 4.7
Oct 24-28	864LV	President (NH) General election	Online	Poll Biden +8.0	Actual Biden +7.4	Difference 0.6
Feb 6-9	212LV	President (NH) Republican primary	Live Phone	Poll Trump +83.0	Actual Trump +75.7	Difference 7.3
Feb 6-9	365LV	President (NH) Democratic primary	Live Phone	Poll Sanders +7.0	Actual Sanders +1.3	Difference 5.7

2018

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Nov 1-4	321LV	House (NH-2) General election	Live Phone	Poll Kuster +21.0	Actual Kuster +13.4	Difference 7.6
Nov 1-4	309LV	House (NH-1) General election	Live Phone	Poll Pappas +13.0	Actual Pappas +8.6	Difference 4.4
Nov 1-4	630LV	Governor (NH) General election	Live Phone	Poll Even	Actual Sununu +7.0	Difference 7.0

2016

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Nov 3-6	322LV	House (NH-2) General election	Live Phone	Poll Kuster +21.0	Actual Kuster +4.4	Difference 16.6
Nov 3-6	323LV	House (NH-1) General election	Live Phone	Poll Shea-Porter +9.0	Actual Shea-Porter +1.3	Difference 7.7
Nov 3-6	692LV	President (NH) General election	Live Phone	Poll Clinton +11.0	Actual Clinton +0.4	Difference 10.6
Nov 3-6	692LV	Senate (NH) General election	Live Phone	Poll Hassan +4.0	Actual Hassan +0.1	Difference 3.9
Nov 3-6	671LV	Governor (NH) General election	Live Phone	Poll Van Ostern +11.0	Actual Sununu +2.3	Difference 13.3
Oct 30-Nov 2	221LV	House (NH-2) General election	Live Phone	Poll Kuster +23.0	Actual Kuster +4.4	Difference 18.6
Oct 30-Nov 2	219LV	House (NH-1) General election	Live Phone	Poll Shea-Porter +7.0	Actual Shea-Porter +1.3	Difference 5.7
Oct 30-Nov 2	466LV	President (NH) General election	Live Phone	Poll Clinton +7.0	Actual Clinton +0.4	Difference 6.6
Oct 30-Nov 2	466LV	Senate (NH) General election	Live Phone	Poll Hassan +7.0	Actual Hassan +0.1	Difference 6.9
Oct 30-Nov 2	455LV	Governor (NH) General election	Live Phone	Poll Van Ostern +8.0	Actual Sununu +2.3	Difference 10.3
Oct 26-29	237LV	House (NH-2) General election	Live Phone	Poll Kuster +15.0	Actual Kuster +4.4	Difference 10.6
Oct 26-29	239LV	House (NH-1) General election	Live Phone	Poll Shea-Porter +4.0	Actual Shea-Porter +1.3	Difference 2.7
Oct 26-29	516LV	President (NH) General election	Live Phone	Poll Clinton +8.0	Actual Clinton +0.4	Difference 7.6
Oct 26-29	516LV	Senate (NH) General election	Live Phone	Poll Hassan +1.0	Actual Hassan +0.1	Difference 0.9
Oct 26-29	503LV	Governor (NH) General election	Live Phone	Poll Van Ostern +1.0	Actual Sununu +2.3	Difference 3.3
Oct 20-25	341LV	President (ME-2) General election	Live Phone	Poll Clinton +3.0	Actual Trump +10.3	Difference 13.3
Oct 20-25	329LV	President (ME-1) General election	Live Phone	Poll Clinton +20.0	Actual Clinton +14.8	Difference 5.2
Oct 20-25	314LV	House (ME-2) General election	Live Phone	Poll Cain +2.0	Actual Poliquin +9.6	Difference 11.6
Oct 20-25	299LV	House (ME-1) General election	Live Phone	Poll Pingree +33.0	Actual Pingree +16.0	Difference 17.0
Oct 20-25	670LV	President (ME) General election	Live Phone	Poll Clinton +11.0	Actual Clinton +3.0	Difference 8.0
Feb 4-8	362LV	President (NH) Republican primary	Live Phone	Poll Trump +21.0	Actual Trump +19.5	Difference 1.5
Feb 4-8	363LV	President (NH) Democratic primary	Live Phone	Poll Sanders +26.0	Actual Sanders +22.5	Difference 3.5

2014

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Oct 29-Nov 2	352LV	House (NH-2) General election	Live Phone	Poll Kuster +7.0	Actual Kuster +10.0	Difference 3.0
Oct 29-Nov 2	405LV	House (NH-1) General election	Live Phone	Poll Guinta +1.0	Actual Guinta +3.6	Difference 2.6
Oct 29-Nov 2	747LV	Governor (NH) General election	Live Phone	Poll Hassan +4.0	Actual Hassan +5.0	Difference 1.0
Oct 29-Nov 2	757LV	Senate (NH) General election	Live Phone	Poll Shaheen +2.0	Actual Shaheen +3.3	Difference 1.3
Oct 22-26	294LV	House (NH-2) General election	Live Phone	Poll Kuster +23.0	Actual Kuster +10.0	Difference 13.0
Oct 22-26	261LV	House (NH-1) General election	Live Phone	Poll Shea-Porter +4.0	Actual Guinta +3.6	Difference 7.6
Oct 22-26	555LV	Governor (NH) General election	Live Phone	Poll Hassan +15.0	Actual Hassan +5.0	Difference 10.0
Oct 22-26	555LV	Senate (NH) General election	Live Phone	Poll Shaheen +8.0	Actual Shaheen +3.3	Difference 4.7
Oct 15-21	291LV	House (ME-2) General election	Live Phone	Poll Poliquin +1.0	Actual Poliquin +5.2	Difference 4.2
Oct 15-21	348LV	House (ME-1) General election	Live Phone	Poll Pingree +38.0	Actual Pingree +29.8	Difference 8.2
Oct 15-21	639LV	Governor (ME) General election	Live Phone	Poll LePage +10.0	Actual LePage +4.8	Difference 5.2
Oct 15-21	667LV	Senate (ME) General election	Live Phone	Poll Collins +35.0	Actual Collins +37.0	Difference 2.0

2013

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Jun 11-14	508LV	Senate (MA) Special election	Live Phone	Poll Markey +13.0	Actual Markey +10.2	Difference 2.8

2012

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Nov 1-4	411LV	House (NH-2) General election	Live Phone	Poll Kuster +7.0	Actual Kuster +4.8	Difference 2.2
Nov 1-4	365LV	House (NH-1) General election	Live Phone	Poll Even	Actual Shea-Porter +3.8	Difference 3.8
Nov 1-4	789LV	Governor (NH) General election	Live Phone	Poll Hassan +9.0	Actual Hassan +12.1	Difference 3.1
Nov 1-4	783LV	President (NH) General election	Live Phone	Poll Obama +4.0	Actual Obama +5.6	Difference 1.6
Oct 31-Nov 2	502LV	Governor (NH) General election	Live Phone	Poll Hassan +5.0	Actual Hassan +12.1	Difference 7.1
Oct 31-Nov 2	502LV	President (NH) General election	Live Phone	Poll Even	Actual Obama +5.6	Difference 5.6
Oct 24-28	583LV	Senate (MA) General election	Live Phone	Poll Even	Actual Warren +7.6	Difference 7.6
Oct 24-28	583LV	President (MA) General election	Live Phone	Poll Obama +14.0	Actual Obama +23.2	Difference 9.2
Oct 17-21	408LV	House (NH-2) General election	Live Phone	Poll Kuster +3.0	Actual Kuster +4.8	Difference 1.8
Oct 17-21	364LV	House (NH-1) General election	Live Phone	Poll Guinta +3.0	Actual Shea-Porter +3.8	Difference 6.8
Oct 17-21	773LV	Governor (NH) General election	Live Phone	Poll Hassan +8.0	Actual Hassan +12.1	Difference 4.1
Oct 17-21	773LV	President (NH) General election	Live Phone	Poll Obama +9.0	Actual Obama +5.6	Difference 3.4
Jan 5-8	461LV	President (NH) Republican primary	Live Phone	Poll Romney +24.0	Actual Romney +16.4	Difference 7.6

2010

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Oct 27-31	451LV	House (NH-2) General election	Live Phone	Poll Kuster +3.0	Actual Bass +1.6	Difference 4.6
Oct 27-31	434LV	House (NH-1) General election	Live Phone	Poll Guinta +7.0	Actual Guinta +11.6	Difference 4.6
Oct 27-31	885LV	Senate (NH) General election	Live Phone	Poll Ayotte +18.0	Actual Ayotte +23.2	Difference 5.2
Oct 27-31	885LV	Governor (NH) General election	Live Phone	Poll Lynch +7.0	Actual Lynch +7.6	Difference 0.6
Oct 17-22	349LV	House (MA-10) General election	Live Phone	Poll Keating +4.0	Actual Keating +4.5	Difference 0.5
Oct 17-22	385LV	House (MA-4) General election	Live Phone	Poll Frank +13.0	Actual Frank +10.5	Difference 2.5
Oct 17-22	519LV	Governor (MA) General election	Live Phone	Poll Patrick +4.0	Actual Patrick +6.4	Difference 2.4
Jan 2-6	554LV	Senate (MA) Special election	Live Phone	Poll Coakley +17.0	Actual Brown +4.8	Difference 21.8

2008

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Oct 30-Nov 2	404LV	House (NH-2) General election	Live Phone	Poll Hodes +21.0	Actual Hodes +15.0	Difference 6.0
Oct 30-Nov 2	413LV	House (NH-1) General election	Live Phone	Poll Shea-Porter +5.0	Actual Shea-Porter +5.9	Difference 0.9
Oct 30-Nov 2	816LV	Senate (NH) General election	Live Phone	Poll Shaheen +6.0	Actual Shaheen +6.3	Difference 0.3
Oct 30-Nov 2	831LV	Governor (NH) General election	Live Phone	Poll Lynch +47.0	Actual Lynch +42.6	Difference 4.4
Oct 30-Nov 2	812LV	President (NH) General election	Live Phone	Poll Obama +11.0	Actual Obama +9.6	Difference 1.4
Oct 27-29	303LV	House (NH-2) General election	Live Phone	Poll Hodes +28.0	Actual Hodes +15.0	Difference 13.0
Oct 27-29	308LV	House (NH-1) General election	Live Phone	Poll Shea-Porter +3.0	Actual Shea-Porter +5.9	Difference 2.9
Oct 27-29	687LV	Senate (NH) General election	Live Phone	Poll Shaheen +5.0	Actual Shaheen +6.3	Difference 1.3
Oct 27-29	619LV	Governor (NH) General election	Live Phone	Poll Lynch +51.0	Actual Lynch +42.6	Difference 8.4
Oct 27-29	692LV	President (NH) General election	Live Phone	Poll Obama +16.0	Actual Obama +9.6	Difference 6.4
Oct 24-26	344LV	House (NH-2) General election	Live Phone	Poll Hodes +22.0	Actual Hodes +15.0	Difference 7.0
Oct 24-26	341LV	House (NH-1) General election	Live Phone	Poll Shea-Porter +8.0	Actual Shea-Porter +5.9	Difference 2.1
Oct 24-26	687LV	Senate (NH) General election	Live Phone	Poll Shaheen +11.0	Actual Shaheen +6.3	Difference 4.7
Oct 24-26	698LV	Governor (NH) General election	Live Phone	Poll Lynch +50.0	Actual Lynch +42.6	Difference 7.4
Oct 24-26	692LV	President (NH) General election	Live Phone	Poll Obama +16.0	Actual Obama +9.6	Difference 6.4
Oct 18-22	349LV	House (NH-2) General election	Live Phone	Poll Hodes +26.0	Actual Hodes +15.0	Difference 11.0
Oct 18-22	358LV	House (NH-1) General election	Live Phone	Poll Shea-Porter +5.0	Actual Shea-Porter +5.9	Difference 0.9
Oct 18-22	725LV	Senate (NH) General election	Live Phone	Poll Shaheen +13.0	Actual Shaheen +6.3	Difference 6.7
Oct 18-22	725LV	Governor (NH) General election	Live Phone	Poll Lynch +50.0	Actual Lynch +42.6	Difference 7.4
Oct 18-22	725LV	President (NH) General election	Live Phone	Poll Obama +15.0	Actual Obama +9.6	Difference 5.4
Jan 5-6	492LV	President (NH) Republican primary	Live Phone	Poll McCain +5.0	Actual McCain +5.4	Difference 0.4
Jan 5-6	599LV	President (NH) Democratic primary	Live Phone	Poll Obama +9.0	Actual Clinton +2.6	Difference 11.6

2006

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Nov 2-5	304LV	House (NH-2) General election	Live Phone	Poll Hodes +9.0	Actual Hodes +7.1	Difference 1.9
Nov 2-5	304LV	House (NH-2) General election	Live Phone	Poll Even	Actual Hodes +7.1	Difference 7.1
Nov 2-5	331LV	House (NH-1) General election	Live Phone	Poll Bradley +9.0	Actual Shea-Porter +2.6	Difference 11.6
Nov 2-5	641LV	Governor (NH) General election	Live Phone	Poll Lynch +56.0	Actual Lynch +48.3	Difference 7.7
Oct 29-Nov 1	320LV	House (NH-2) General election	Live Phone	Poll Even	Actual Hodes +7.1	Difference 7.1
Oct 29-Nov 1	340LV	House (NH-1) General election	Live Phone	Poll Bradley +5.0	Actual Shea-Porter +2.6	Difference 7.6
Oct 29-Nov 1	663LV	Governor (NH) General election	Live Phone	Poll Lynch +52.0	Actual Lynch +48.3	Difference 3.7
Oct 22-25	585LV	Senate (MA) General election	Live Phone	Poll Kennedy +41.0	Actual Kennedy +38.8	Difference 2.2
Oct 22-25	585LV	Governor (MA) General election	Live Phone	Poll Patrick +25.0	Actual Patrick +20.3	Difference 4.7

2004

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Oct 28-31	464LV	House (NH-2) General election	Live Phone	Poll Bass +18.0	Actual Bass +20.1	Difference 2.1
Oct 28-31	492LV	House (NH-1) General election	Live Phone	Poll Bradley +19.0	Actual Bradley +26.8	Difference 7.8
Oct 28-31	957LV	Senate (NH) General election	Live Phone	Poll Gregg +36.0	Actual Gregg +32.5	Difference 3.5
Oct 28-31	957LV	Governor (NH) General election	Live Phone	Poll Benson +1.0	Actual Lynch +2.1	Difference 3.1
Oct 28-31	963LV	President (NH) General election	Live Phone	Poll Kerry +1.0	Actual Kerry +1.4	Difference 0.4
Oct 25-27	346LV	House (NH-2) General election	Live Phone	Poll Bass +27.0	Actual Bass +20.1	Difference 6.9
Oct 25-27	383LV	House (NH-1) General election	Live Phone	Poll Bradley +34.0	Actual Bradley +26.8	Difference 7.2
Oct 25-27	758LV	Senate (NH) General election	Live Phone	Poll Gregg +39.0	Actual Gregg +32.5	Difference 6.5
Oct 25-27	758LV	Governor (NH) General election	Live Phone	Poll Benson +3.0	Actual Lynch +2.1	Difference 5.1
Oct 25-27	758LV	President (NH) General election	Live Phone	Poll Kerry +4.0	Actual Kerry +1.4	Difference 2.6
Jan 23-25	459LV	President (NH) Democratic primary	Live Phone	Poll Kerry +11.0	Actual Kerry +12.1	Difference 1.1
Jan 20-22	450LV	President (NH) Democratic primary	Live Phone	Poll Kerry +18.0	Actual Kerry +12.1	Difference 5.9

2002

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Oct 30-Nov 2	335LV	House (NH-2) General election	Live Phone	Poll Bass +30.0	Actual Bass +16.0	Difference 14.0
Oct 30-Nov 2	305LV	House (NH-1) General election	Live Phone	Poll Bradley +6.0	Actual Bradley +19.6	Difference 13.6
Oct 30-Nov 2	644LV	Senate (NH) General election	Live Phone	Poll Sununu +1.0	Actual Sununu +4.4	Difference 3.4
Oct 30-Nov 2	642LV	Governor (NH) General election	Live Phone	Poll Benson +14.0	Actual Benson +20.5	Difference 6.5
Oct 23-29	309LV	House (NH-2) General election	Live Phone	Poll Bass +6.0	Actual Bass +16.0	Difference 10.0
Oct 23-29	316LV	House (NH-1) General election	Live Phone	Poll Bradley +18.0	Actual Bradley +19.6	Difference 1.6
Oct 23-29	648LV	Senate (NH) General election	Live Phone	Poll Shaheen +4.0	Actual Sununu +4.4	Difference 8.4
Oct 23-29	651LV	Governor (NH) General election	Live Phone	Poll Benson +12.0	Actual Benson +20.5	Difference 8.5

2000

Dates	Sample	Race	Methodology	Poll margin	Election margin	Difference
Nov 1-5	801LV	Governor (NH) General election	Live Phone	Poll Shaheen +6.0	Actual Shaheen +5.0	Difference 1.0
Nov 1-5	801LV	President (NH) General election	Live Phone	Poll Bush +6.0	Actual Bush +1.3	Difference 4.7
Jan 29-Feb 1	400LV	President (NH) Republican primary	Live Phone	Poll McCain +7.0	Actual McCain +18.2	Difference 11.2
Jan 29-Feb 1	400LV	President (NH) Democratic primary	Live Phone	Poll Gore +3.0	Actual Gore +4.1	Difference 1.1
Jan 25-28	400LV	President (NH) Republican primary	Live Phone	Poll McCain +8.0	Actual McCain +18.2	Difference 10.2
Jan 25-28	400LV	President (NH) Democratic primary	Live Phone	Poll Gore +12.0	Actual Gore +4.1	Difference 7.9

Show all

How this works

FiveThirtyEight’s pollster ratings are calculated by analyzing the historical accuracy of each polling organization’s polls along with its methodology. Accuracy scores are adjusted for the type of election polled, the poll’s sample size, the performance of other polls surveying the same race and other factors. We also calculate measures of statistical bias in the polls. When a pollster publishes multiple versions of the same survey (for example, versions with and without third-party candidates included), FiveThirtyEight uses an average of the different versions to calculate the pollster’s rating. However, all versions of these polls are listed here. Read more about our methodology»

Download this data as an Excel spreadsheet or get it on GitHub.

Design and development by Elena Mejía and Aaron Bycoffe. Research by Mary Radcliffe, Cooper Burton and Dhrumil Mehta. Copy editing by Andrew Mangan. Visual editing by Christopher Groskopf. Statistical model by Nate Silver.

Send us feedback.