For 2021 Census the questionnaire for the 2011 census has been used. It includes a comprehensive list of socio-economic variables, including health and vital statistics alongside with housing characteristics.

Like in the previous census, two versions of the questionnaire will be considered – a short and long one. The short questionnaire consisting of approx. 22 indicators will be considered for all households. In turn, the long questionnaire consisting of approx. 74 indicators will aim at collecting information on housing, population and its demographic and social characteristics through a sample survey of around 1% of all households.