One person in each household was designated as the head, that is, the person who was reported as the head by the members of the household. However, if a married woman living with her husband was reported as the head, her husband is considered as the head for the purpose of simplifying the tabulations.

Two types of household head are distinguished -- head of a family and primary individual. A family head is a household head living with one or more persons related to him by blood, marriage, or adoption. A primary individual is a household head living alone or with non-relatives only.

A woman married to and living with a household head. This category includes women in common-law marriages as well as women in formal marriages. In complete- count tabulations, the number of wives of head is the same as the number of husband-wife households and the number of husband-wife families. The number does not equal the number of married women, husband present, since it excludes those married women whose husbands are not household heads (as in subfamilies, Concept No. 81.111).

A son, daughter, stepchild, or adopted child of the head of the household of which he is a member, regardless of the child's age or marital status. The category excludes sons-in-law and daughters-in-law. (Also see own children Concept No. 84.1. )

Household member related to head by blood, marriage, or adoption, but not included specifically in another relationship category. In the sample they are classified as grandchild of head, parent of head or son or daughter-in-law of head, brother or sister of head, parent-in-law of heads or brother or sister-in-law of head and other relative of head, and are identified as separate categories in some tabulations.

Any household member not related to the head; further classified as lodger, resident employee, and friend or partner. These categories are recorded as sample items only.

Persons identified as roomer, boarder, lodger. In the sample it includes foster children not already identified as roomer, boarder or lodger.

An employee of the household (such as maid, cook, hired farm hand, companion, nurse), who usually resides in the housing unit. Also includes the employees relatives living in the housing unit.

This is a residual category, including all persons not identified as roomer, boarder, or lodger or resident employee. In tabulations, it is often combined with roomer, boarder, lodger.