The CZSO published another important characteristic of housekeeping households from the 2021 Census, namely the number of dependent children living in one-family households. Almost 2.1 million dependent children were living in one-family households in 2021, an average of 0.75 dependent children per a housekeeping household of this type. Compared to 2011, this represents a slight increase.

In the 2021 Census, more than half of one-family households (54%) had no dependent children living in them. Households with one dependent child represented over one fifth of all one-family households (22%), another almost a fifth then households with two dependent children.

The largest number of dependent children - over 300,000 in absolute numbers - lived in households consisting of one family in the Středočeský Region, where the average number of children reached 0.81 dependent children. At the same time, this region recorded the lowest share of one-family households without dependent children (51 %). On the other side stood Plzeňský region with 0.71 of dependent children per one one-family household.

A dependent child is defined as a person whose status in the household is „a child“, is not included in the labour force and is 0-25 years of age, which means economically dependent on others. The number of dependent children was determined in all one-family household.

Tracking the development of the number of dependent children in households is limited by a different methodology between Censuses, fully comparable is only data from 2021 and 2011 Censuses. There have not been many changes in last 10 years, the share of households with no dependent children represents roughly a half of all one-family households. A slight increase in both absolute and relative numbers was recorded in the category 3 or more dependent children.

The published results in the form of tables and cartograms up to the level of regions are available on the website scitani.gov.cz. The data for all territorial units up to the level of municipalities and municipality or administrative districts are available in the CZSO Public Database.