Household Defined
According to the U.S. Census Bureau, "A household includes all the persons who occupy a housing unit.  A housing unit is a house, an apartment, a mobile home, a group of rooms, or a single room that is occupied as separate living quarters.  Separate living quarters are those in which the occupants live and eat separately from any other persons in the building and which have direct access from the outside of the building or through a common hall.  The occupants may be a single family, one person living alone, two or more families living together, or any other group of related or unrelated persons who share living arrangements."