Ipsos
Global market research and polling firm; conducted Welsh Senedd polling in the 2026 election campaign.
Last refreshed: 26 April 2026 · Appears in 2 active topics
How accurate has Ipsos been at predicting Welsh election outcomes, and how does it compare to YouGov's MRP?
Timeline for Ipsos
Mentioned in: Wales Greens fall from 10 to 2
UK Local Elections 2026Mentioned in: Restore Britain enters tracker at 4% nationally
UK Local Elections 2026Published Wales Senedd poll confirming approximately 12% Welsh Labour vote share
UK Local Elections 2026: Welsh Labour at 12%, lowest since 1906Mentioned in: YouGov second Welsh MRP flips Plaid lead
UK Local Elections 2026Conducted separate poll finding 78% oppose ground troops
Iran Conflict 2026: 59% say Iran war was wrong, no rally- What is Ipsos and what polling did they do for the 2026 Welsh election?
- Ipsos is a global polling and market research company that conducted Welsh Senedd voting intention polls during the 2026 campaign, contributing to PollCheck's multi-pollster aggregate.
- What is Ipsos and how does it conduct polls?
- Ipsos is a global market research company founded in France in 1975, operating in 90+ countries. It conducts voting intention surveys via telephone and online panels. It provides raw voting intention figures rather than MRP-adjusted seat projections.Source: Ipsos
- What do Ipsos polls show for the 2026 Welsh election?
- Ipsos conducted Welsh voting intention polling for the 2026 Senedd election, with its figures contributing to PollCheck's aggregate alongside YouGov and other pollsters. The aggregate showed Plaid Cymru and Reform UK both at around 28-29%.Source: PollCheck
Background
Ipsos is one of the world's largest market research and polling companies, founded in France in 1975, with operations in more than 90 countries. The company conducts public opinion surveys, audience research, and social tracking studies for governments, media organisations, and commercial clients globally. In the UK, Ipsos operates as Ipsos UK and is one of the major polling firms contracted by national newspapers and broadcasters for voting intention research.
During the 2026 Welsh and Scottish election cycle, Ipsos conducted polling on Senedd and Holyrood voting intention cited alongside YouGov and PollCheck as part of the multi-source polling picture. In Wales, Ipsos polling tracked party support under the new closed-list PR system, informing projections for the 7 May result. Ipsos is distinct from Electoral Calculus and More in Common in that it provides raw voting intention polls rather than multi-level regression and post-stratification (MRP) models; its Welsh data contributed to PollCheck's aggregate alongside other pollsters.
Ipsos has been an active part of the UK polling landscape for decades and has previously faced scrutiny over accuracy in general election polling — participating in the post-2015 and post-2019 British Polling Council inquiries into polling failures. Its 2026 Welsh figures are one input into aggregate models rather than a standalone projection.
