How many families are there in Tucson as of 2010?
As of the census of 2010, there were 520,116 people, 229,762 households, and 112,455 families residing in the city. The population density was 2,500.1 inhabitants per square mile (965.3/km²). There were 209,609 housing units at an average density of 1,076.7 per square mile (415.7/km²). The racial makeup of the city was 69.7% White (down from 94.8% in 1970), 5.0% Black or African-American, 2.7% Native American, 2.9% Asian, 0.2% Pacific Islander, 16.9% from other races, and 3.8% from two or more races. Hispanic or Latino of any race were 41.6% of the population. Non-Hispanic Whites were 47.2% of the population in 2010, down from 72.8% in 1970.