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Pollster file

YouGov

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: 447
Mean absolute error: 4.60percentage points
Historical bias: D+1.01
Represented cycles: 142004–2025
Current archive: 428canonical records
History span: Oct 12, 2004through Oct 28, 2025

Identity

Known names and relationships

Known aliases: CBS News/YouGov · CES/YouGov · Rose Institute/YouGov · The Economist/YouGov · University of Massachusetts Lowell/YouGov · YouGov/Cooperative Election Study · YouGov/The Economist
Organization type: Single canonical organization
Cycles represented: 2004 · 2006 · 2008 · 2009 · 2010 · 2012 · 2014 · 2016 · 2017 · 2018 · 2020 · 2022 · 2024 · 2025

447 eligible historical polls across 14 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 · 428 total

Generic ballot

Dem +3

Dem 39% · Rep 36%

Field dates: May 30–Jun 2, 2025
Sample: 1,606 A
Sponsor / client: Not reported in archive
Partisan sponsorship: No partisan sponsorship flag

Generic ballot

Dem +2

Dem 43% · Rep 41%

Field dates: May 23–May 26, 2025
Sample: 1,484 RV
Sponsor / client: Not reported in archive
Partisan sponsorship: No partisan sponsorship flag

Generic ballot

Dem +1

Dem 43% · Rep 42%

Field dates: May 16–May 19, 2025
Sample: 1,553 RV
Sponsor / client: Not reported in archive
Partisan sponsorship: No partisan sponsorship flag

Race

Massachusetts · Governor

Healey +6

Would not vote 6% · Don't know 38% · Brian Shortsleeve 12% · Maura Healey 44%

Field dates: Feb 14–Feb 20, 2025
Sample: 700 A
Sponsor / client: UMass Amherst
Partisan sponsorship: No partisan sponsorship flag

Race

Massachusetts · Governor

Healey +8

Would not vote 6% · Don't know 36% · Lew Evangelidis 14% · Maura Healey 44%

Field dates: Feb 14–Feb 20, 2025
Sample: 700 A
Sponsor / client: UMass Amherst
Partisan sponsorship: No partisan sponsorship flag

Race

Massachusetts · Governor

Healey +19

Would not vote 4% · Don't know 26% · John Deaton 25% · Maura Healey 45%

Field dates: Feb 14–Feb 20, 2025
Sample: 700 A
Sponsor / client: UMass Amherst
Partisan sponsorship: No partisan sponsorship flag

Race

Massachusetts · Senate

Markey +2

Don't know 33% · Ed Markey 35% · Charles D. Baker 33%

Field dates: Feb 14–Feb 20, 2025
Sample: 700 A
Sponsor / client: UMass Amherst | WCVB-TV
Partisan sponsorship: No partisan sponsorship flag

Race

Massachusetts · Governor

Healey +2

Would not vote 6% · Don't know 39% · Peter Durant 14% · Maura Healey 41%

Field dates: Feb 14–Feb 20, 2025
Sample: 700 A
Sponsor / client: UMass Amherst
Partisan sponsorship: No partisan sponsorship flag

Race

Massachusetts · Governor

Healey +1

Would not vote 6% · Don't know 39% · Mike Kennealy 15% · Maura Healey 40%

Field dates: Feb 14–Feb 20, 2025
Sample: 700 A
Sponsor / client: UMass Amherst
Partisan sponsorship: No partisan sponsorship flag

Generic ballot

Rep +2

Dem 35% · Rep 37%

Field dates: Feb 16–Feb 18, 2025
Sample: 1,602 A
Sponsor / client: Not reported in archive
Partisan sponsorship: No partisan sponsorship flag

Generic ballot

Dem +1

Dem 42% · Rep 41%

Field dates: Feb 16–Feb 18, 2025
Sample: 1,450 RV
Sponsor / client: Not reported in archive
Partisan sponsorship: No partisan sponsorship flag

Approval

Presidential approval · Approval

Disapprove +26

Approve 35% · Disapprove 61%

Field dates: May 29–Jun 1, 2026
Sample: 1,453 RV
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 · 447 total

Cycle	Race	Type	Field end	Sample	Poll	Result	Error
2016	2016_Sen-G_GA	Sen-G	2016-11-04	995	R+7.0	R+13.8	D+6.8
2016	2016_Pres-G_UT	Pres-G	2016-11-04	762	R+17.0	R+18.1	D+1.1
2016	2016_Pres-G_PA	Pres-G	2016-11-04	931	D+2.0	R+0.7	D+2.7
2016	2016_Pres-G_GA	Pres-G	2016-11-04	995	R+6.0	R+5.1	R+0.9
2016	2016_Sen-G_OH	Sen-G	2016-11-03	1,189	R+13.0	R+20.9	D+7.9
2016	2016_Sen-G_FL	Sen-G	2016-11-03	1,188	R+3.0	R+7.7	D+4.7
2016	2016_Pres-G_OH	Pres-G	2016-11-03	1,189	R+1.0	R+8.1	D+7.1
2016	2016_Pres-G_FL	Pres-G	2016-11-03	1,188	0	R+1.2	D+1.2
2016	2016_Pres-G_US	Pres-G	2016-10-31	1,233	D+3.0	D+2.1	D+0.9
2016	2016_House-G_US	House-G	2016-10-31	1,228	D+5.0	R+1.1	D+6.1
2016	2016_Pres-G_CA	Pres-G	2016-10-28	1,498	D+20.0	D+30.1	R+10.1
2016	2016_Sen-G_PA	Sen-G	2016-10-27	1,091	D+3.0	R+1.4	D+4.4
2016	2016_Sen-G_NC	Sen-G	2016-10-27	992	0	R+5.7	D+5.7
2016	2016_Sen-G_CO	Sen-G	2016-10-27	997	D+5.0	D+5.7	R+0.7
2016	2016_Sen-G_AZ	Sen-G	2016-10-27	994	R+5.0	R+13.0	D+8.0
2016	2016_Pres-G_PA	Pres-G	2016-10-27	1,091	D+8.0	R+0.7	D+8.7
2016	2016_Pres-G_NC	Pres-G	2016-10-27	992	D+3.0	R+3.7	D+6.7
2016	2016_Pres-G_CO	Pres-G	2016-10-27	997	D+3.0	D+4.9	R+1.9
2016	2016_Pres-G_AZ	Pres-G	2016-10-27	994	R+2.0	R+3.5	D+1.6
2016	2016_Gov-G_NC	Gov-G	2016-10-27	992	D+2.0	D+0.2	D+1.8
2016	2016_Pres-G_US	Pres-G	2016-10-24	1,209	D+4.0	D+2.1	D+1.9
2016	2016_House-G_US	House-G	2016-10-24	1,200	D+5.0	R+1.1	D+6.1
2016	2016_Pres-G_TX	Pres-G	2016-10-22	1,031	R+3.0	R+9.0	D+6.0
2016	2016_Sen-G_FL	Sen-G	2016-10-21	1,042	R+2.0	R+7.7	D+5.7
2016	2016_Pres-G_FL	Pres-G	2016-10-21	1,042	D+3.0	R+1.2	D+4.2
2016	2016_Sen-G_NH	Sen-G	2016-10-19	772	R+4.0	D+0.1	R+4.1
2016	2016_Pres-G_TX	Pres-G	2016-10-19	959	R+3.0	R+9.0	D+6.0
2016	2016_Pres-G_NH	Pres-G	2016-10-19	772	D+5.0	D+0.4	D+4.6
2016	2016_House-G_NH-2	House-G	2016-10-19	382	D+11.0	D+4.4	D+6.6
2016	2016_House-G_NH-1	House-G	2016-10-19	380	D+4.0	D+1.3	D+2.7
2016	2016_Gov-G_NH	Gov-G	2016-10-19	772	D+1.0	R+2.3	D+3.3
2014	2014_House-G_US	House-G	2014-10-29	802	R+4.0	R+5.9	D+1.9
2014	2014_Sen-G_NC	Sen-G	2014-10-28	1,727	D+2.0	R+1.6	D+3.6
2014	2014_Sen-G_IA	Sen-G	2014-10-28	1,112	D+1.0	R+8.3	D+9.3
2014	2014_Sen-G_GA	Sen-G	2014-10-28	1,743	R+1.5	R+7.7	D+6.2
2014	2014_Sen-G_CO	Sen-G	2014-10-28	1,417	R+0.8	R+1.9	D+1.1
2014	2014_Gov-G_WI	Gov-G	2014-10-28	1,494	R+2.0	R+5.7	D+3.7
2014	2014_Gov-G_KS	Gov-G	2014-10-28	1,137	R+1.0	R+3.7	D+2.7
2014	2014_Gov-G_IA	Gov-G	2014-10-28	1,112	R+15.0	R+21.7	D+6.7
2014	2014_Gov-G_GA	Gov-G	2014-10-28	1,743	R+4.0	R+7.9	D+3.9
2014	2014_Gov-G_FL	Gov-G	2014-10-28	1,795	0	R+1.1	D+1.1
2014	2014_Gov-G_CO	Gov-G	2014-10-28	1,417	D+2.0	D+3.3	R+1.3
2014	2014_Sen-G_MA	Sen-G	2014-10-24	591	D+16.0	D+23.9	R+7.9
2014	2014_Gov-G_MA	Gov-G	2014-10-24	591	D+3.0	R+1.9	D+4.9
2014	2014_Sen-O_LA	Sen-G	2014-10-20	1,316	D+0.5	D+1.1	R+0.6
2014	2014_Sen-G_WY	Sen-G	2014-10-20	258	R+40.0	R+54.9	D+14.9
2014	2014_Sen-G_WV	Sen-G	2014-10-20	877	R+22.0	R+27.6	D+5.7
2014	2014_Sen-G_VA	Sen-G	2014-10-20	1,605	D+10.0	D+0.8	D+9.2
2014	2014_Sen-G_TX	Sen-G	2014-10-20	3,987	R+22.0	R+27.2	D+5.2
2014	2014_Sen-G_TN	Sen-G	2014-10-20	974	R+22.0	R+30.0	D+8.0

4 further rows are held in this pollster’s history shard as within-party or nonpartisan contests (Prim). Those carry no D/R orientation, so they are excluded from the error, bias and coverage figures above and from the table.

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.