Every household on the Isle of Man must submit details of who lives in the home on Sunday night.
Although NI's 1926 Census forms were lost, surviving data gives a snapshot of society at the time.
The 1926 census is available online from Saturday morning and the public are able to look up their own families.
The Cabinet Office will be holding an interim census on 26 April, recording all Manx households.
The two-phase exercise - the world’s most ambitious - will see three million officials count every Indian.
The survey asked pupils as young as 14 about their sexual experiences but parents said they were not told about the nature of the questions.
BBC Scotland visits Tarves in Aberdeenshire - one of 33 places which are no longer villages after seeing their populations swell.
More than 11,000 people who moved to Northern Ireland are coming from other parts of the UK, 17,000 are coming from elsewhere.
Genealogical riches from every county of Ireland feature among new historical records which are now available online.
