Households and Families: 2010

"The 2010 Census enumerated 308.7 million people in the United States, a 9.7 percent increase from 281.4 million in Census 2000. Of the total population in 2010, 300.8 million lived in 116.7 million households for an average of 2.58 people per household. This was down from an
average of 2.59 in 2000 when 273.6 million people lived in 105.5 million households. The remaining 8.0 million people in 2010 lived in group-quarters arrangements such as school dormitories, nursing homes, or military barracks..."