Family Survey 2025
Family Survey 2025
Family Survey 2025
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Sommaire
Traitement statistique
Source data
The sample for the Family survey is made up of geographic areas selected from a sample of municipalities conducting the annual census survey.
Frequency of data collection
Punctual or aperiodic
Data collection
The survey was conducted only once, at the same time as the annual population census survey of 2025.
People who respond to the census on paper also respond to the Family Survey on paper.
The paper data collection was carried out through the so-called drop off and pick-up method.
Four-page questionnaires were delivered by census officers to all persons in the survey sample at the same time as the usual census documents (note, dwelling questionnaire, individual form). They were collected in the same conditions.
People who respond to the census online also respond to the Family survey online. A notification email is sent to the concerned individuals: it contains the link to the portal for answering the online questionnaire. In the event of non-response, people are contacted by e-mail and post. A sub-sample of non-respondents internet is contacted to complete the survey by telephone.
Data collection period
Collection is carried out at the same time as the annual census survey.
Internet collection is extended to March 24, 2025, to give households time to respond; telephone collection is extended to the end of July 2025.
Survey unit
Individual
Sampling method
The sample of Family Survey is a sub-sample of the annual population census survey 2025. A sample of municipalities was constituted at first among the municipalities listed in 2025. Then, within these municipalities, a sub-sample of geographical areas was constituted. Finally, within these geographical areas, all adults of a given sex were investigated: all grown-up men were investigated in approximately one-third of the
areas, and all grown-up women in the remaining parts. As in the past, women are over-represented to update detailed fertility analysis.
Sample size
Approximately 490.000 individuals
Data collection documents
Questionnaire related to the Family survey (en)
- Questionnaire related to the Family survey. (pdf, en, 284 Ko, 19/03/2025)
Data compilation
A process of cleaning, followed by correction of non-response and adjustment to margins, is performed on the collected data.