A household consists of all the persons who occupy a housing unit. A house, an apartment or other group of rooms, or a single room, is regarded as a housing unit when it is occupied or intended for occupancy as separate living quarters; that is, when the occupants do not live and eat with any other persons in the structure and there is either (1) direct access from the outside or through a common hall or (2) a kitchen or cooking equipment for the exclusive use of the occupants.
All persons who are not members of households are regarded as living in group quarters; that is, in living quarters for institutional inmates or for other groups containing five or more persons unrelated to the person in charge. Most of the persons in group quarters live in rooming houses, college dormitories, military barracks, or institutions. The present report excludes persons in group quarters, a very small number of whom may have had relatives present. In the 1960 Census, persons in group quarters were sampled on an individual basis, and no information on family relationship was obtained for them.
