Key information about Welsh life over the past decade will be released today from the 2011 Census.
Interesting areas could include Welsh language and national identity, ethnicity, religion, migration and health.
The first release of 2011 Census data in July provided household and population estimates - by age and sex - for Wales and its local authorities.
It revealed that Wales' population now exceeds three million - an increase of five per cent in the past decade.
The latest figures will be published by the Office for National Statistics at 9.30am.
More top news
Not a pleasant night by any means, with further downpours in the west and over the hills. But it will remain mild!
How a little boy from Magor inspired his village to become "Autism Aware"
Nath talks to ITV News about being diagnosed with a form of autism at 16 and how he is aspiring to be a musician.