In Switzerland there are about 3.9 million private households (at the end of 2021). Over a third of these households are one-person households, which corresponds to 17% of the permanent resident population. Almost one third of the households are two-person households, which represents 30% of the permanent resident population. The average household size is 2.19 persons.
More than one-third of households are one-person households, 27% of households are couples without children. Of the 1.1 million households with children under 25 years (29% of households) one-sixth consist of lone parents, most often (83%) single mothers.