Around 19,000 households in South and East Belfast, Craigavon, and West Fermanagh have been invited to take part in a census rehearsal on Sunday 13 October. If you have received an invitation letter, take part and fill out the questionnaire.
The census is usually run every 10 years to provide a comprehensive picture of the population to help shape public services.
The rehearsal is a small-scale version of the full census being planned for March 2021.
It helps to 'fine-tune' planning for the 2021 census and make sure that everything works as efficiently as possible 18 months from now.
Online or on paper
Most householders in rehearsal areas have received a letter with an internet access code to allow them to fill out their questionnaire at this link:
Other householders have received a paper questionnaire which they can fill out and return in the pre-paid envelope provided.
Anyone who wants to get a paper questionnaire should phone 0800 328 2021 - language support is available for those who need it.
You can get help:
You may fill out your questionnaire before census rehearsal day. If a return is not made by then, you may be visited by a member of census field staff.