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Cyngor Sir Ynys Môn - Isle of Anglesey County Council

Census 2021

Census day was 21 March 2021.

The online census has now closed.

You can still request a paper census questionnaire. Please see the 'start census' link at the bottom of this page.

You must complete the census by law or you could be fined up to £1,000.

The census is a once-in-a-decade survey that gives us the most accurate estimate of all the people and households in England and Wales. It has been carried out every decade since 1801, with the exception of 1941.

A successful census will ensure everyone from local government to charities can put services and funding in the places where they are most needed.

The census will include questions about your sex, age, work, health, education, household size and ethnicity. And, for the first time, there will be a question asking people whether they have served in the armed forces, as well as voluntary questions for those aged 16 and over on sexual orientation and gender identity.

In Wales, households will also be asked a specific question about their Welsh language skills.

Results will be available within 12 months, although personal records will be locked away for 100 years, kept safe for future generations.

Start census

The census is a once-in-a-decade survey that gives us the most accurate estimate of all the people and households in England and Wales.

The information you give helps decide how services are planned and funded in your local area. This could mean things like doctors’ surgeries, housing or new bus routes.

It asks questions about you and your household to build a picture of all of us. It looks at who we are and how we live.

There’s no other survey that gives as much information about our society and future needs.

Census day is March 21.

However, households will receive a letter in the post in early March, giving them details of how to take part in the mandatory survey.

They will also receive a unique access code, inviting them to complete the survey online, although paper questionnaires are available on request.

The census helps us understand what our society needs now and what it will likely need in the future. The information it collects helps with decisions on the planning and funding of services in your area.

This could include schools, doctors’ surgeries, emergency services or even local support groups.

Charities also use census information to help get the funding they need. Businesses use it to decide where to set up, which creates job opportunities.

The census will take around 10 minutes per person to complete. It’s easy to do and can be done on any device, including a computer, laptop, tablet or mobile phone.

Translation booklets are available to download.

If your language is not represented, please contact the customer contact centre on 0800 169 2021.

The help pages at explain how you can get help.

These include general guidance, language assistance and a wide range of accessible formats including video and audio guides (English and Welsh).

You can also phone the contact centre on 0800 169 2021 or visit one of our support centres offering assistance.

You could face prosecution, a hefty fine (up to £1000) and a criminal record.

Please visit for more information, and any questions you have, about the census.

At the time of the last census…

  • 69,751 people lived in the Isle of Anglesey, including 3,441 students
  • 78 people worked as civil engineers
  • there were 13 archivists and curators
  • 742 people were farmers
  • there were 278 chefs
  • just over 20,000 of you used a car or van to drive to work, although nearly 2,500 walked to work
  • Isle of Anglesey was made up of 113 different ethnicities
  • other than the UK, Ireland was the top country of birth, with Polish the most common main language other than English or Welsh, spoken by 90 of you
  • there were 35 households with 8 or more people
  • 131 people said they were Jedi Knights

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