The 1921 Census of Scotland, taken on 19 June of that year, has been released online this morning and is likely to be of interest to many researchers with Irish and Scots-Irish ancestors.
You'll find the collection on the Scotland's People database where you'll need to register if you don't already have an account. There's no charge for searching,and the free information returned in a search should help you identify the individuals of most interest to you.
To view any returns, you'll need to have to buy 'credits'.
The collection holds details of 4.8million people.