Derived from the age responses for the householders. (See the definition of householder under "Household Relationship.") Age and household relationship were determined on a complete-count basis.
The most frequent applications of age of householder in 1980 tabulations involve only two categories: under 65 years old and 65 years and over. More detailed categories appear among the housing tabulations, for example: less than 25 years, 25 to 29, 30 to 34, 35 to 44, 45 to 59, 60 to 64, and 65 years and over. Age of householder is also derivable from age tabulations cross-classified by household relationship (STF 2). Age of householder is derivable from basic records in single years, 15 to 112. Public-use microdata samples also show single years to 99, but group together householders 100 years and over.
In 1970 and previous censuses, Age of Head was tabulated instead of Age of Householder (see "Household Relationship").