Yes, as with the Census in 2011 you are able to use the write-in option on a number of questions to identify as Cornish

In 2011, when asked their national identity 83,499 people across England and Wales identified themselves as Cornish – 73,220 of those lived in Cornwall.   

There are three ways you can identify yourself as Cornish on the 2021 Census form.

• Question 14 (Nationality)
• Questions 15 (ethnicity)
• Question 18 (language)

This is done by selecting the ‘Other’ box and writing or typing in ‘Cornish’.

There is information contained within the guidance help function of the online form alongside Q14 Nationality.

This specifically mentions Cornish. There will not be prompts for questions 15 and 18 on the online form but you can still complete as per the instructions above.

A poster showing ways you can complete as Cornish can be downloaded here.