A child under 18 years old who is a son or daughter by birth, marriage (a stepchild), or adoption. In certain tabulations, own children are further classified as living with two parents or with one parent only. For 100-percent tabulations, own children consist of all sons/daughters of householders who are under 18 years of age. For sample data, own children consist of sons/daughters of householders who are under 18 years of age and who have never been married, therefore, numbers of own children of householders may be different in these two tabulations.
"Related children" in a family include own children and all other people under 18 years of age in the household, who are related to the householder, except the spouse of the householder. Foster children are not included since they are not related to the householder.