How Many People Speak Welsh? Why the Numbers Disagree

The best single answer is 538,300: that is the Census 2021 estimate of people aged three or older in Wales who reported being able to speak Welsh. A newer Annual Population Survey estimate is much higher: 844,300 for the year ending December 2025. Both are official statistics, but they measure the population in different ways and should not be treated as interchangeable.

How many people speak Welsh?

For a general reference question, use the census figure and include its date: 538,300 usual residents aged three or older in Wales, or 17.8%, on Census Day in March 2021. The Office for National Statistics describes the census as the most accurate estimate of the whole population, and the Welsh Government uses it to monitor the Cymraeg 2050 ambition.

The figure does not mean that everyone speaks Welsh with the same confidence or frequency. The census question was based on self-assessment. People decided whether they could understand spoken Welsh, speak it, read it or write it, and a parent or another household member could answer for someone else.

What does the latest Annual Population Survey say?

The Welsh Government's April 2026 release estimated 844,300 Welsh speakers in the year ending 31 December 2025. That was 27.3% of people aged three or older living in Wales.

The same release estimated that 448,800 people spoke Welsh daily, 151,200 weekly and 200,400 less often. Those frequency groups answer a different question from simple ability, so they should not be silently added to or substituted for the census total.

The APS is useful because it is updated more frequently than a ten-year census. It is a sample survey, however, so its figures are estimates with uncertainty rather than a count of every resident.

Why are the Census and APS figures so different?

The gap is longstanding. The census is a statutory questionnaire completed across the population. The APS is voluntary and interviewer-led, using a sample that is weighted to represent Wales. Even similarly worded questions can produce different answers in those settings.

In an interview, each language skill can be discussed separately. On a self-completed census form, a respondent makes a more categorical choice and may interpret "can speak Welsh" more strictly. The surveys also cover different periods, use different collection methods and are affected differently by who responds.

Research linking Census 2021 with Labour Force Survey responses found genuine disagreement at individual level. Around two in five people who recorded that they could speak Welsh in either source gave the opposite answer in the other. Agreement was greater among daily speakers and weaker among people who used Welsh less often.

Which Welsh-speaker figure should you quote?

Does "speaks Welsh" mean fluent?

No. Neither headline should be rewritten as a count of fluent speakers. The census asked whether people could speak Welsh, not how fluently or how often. The APS asks about ability and also publishes separate frequency information, but the ability total still includes a wide range of confidence and use.

A learner who can hold a basic conversation may answer yes, while another person with similar skills may answer no because their personal threshold is higher. That is not statistical dishonesty; it is an unavoidable feature of self-assessed language ability.

Where are Welsh speakers found?

Welsh is spoken throughout Wales, but both numbers and percentages vary by place. A large urban authority can contain many Welsh speakers while having a lower percentage than a smaller western or north-western authority. That is why "most speakers" can mean the largest number or the largest share.

Our guide to whether Cardiff has the most Welsh speakers separates those two measures. The history behind the national pattern is covered in why Welsh declined and how Wales fought to keep it.

A clear way to write the statistic

A careful sentence names the source, date, age group and measure:

Census 2021 estimated that 538,300 usual residents aged three or older in Wales could speak Welsh, while the Annual Population Survey estimated 844,300 for the year ending December 2025. The figures are not directly comparable.

In Welsh, a Welsh speaker is a siaradwr Cymraeg; the plural is siaradwyr Cymraeg. The most useful habit in either language is the same: keep the source attached to the number.