Average Number of Persons Per Household, 2010
The average household size in Arizona in 2010 was 2.63, a little higher than the national average of 2.58. Within Arizona, the average ranged from 2.19 in La Paz County to 3.10 in Apache County. The age distribution is a key factor in explaining the variations in average household size. Areas with a high percentage of retirees have a relatively low figure while areas with many families with children living at home have a relatively high average household size.