As of the census of 2000, there were 463,585 people, 182,194 households, and 115,146 families residing in the county. The population density was 1,401 people per square mile (541/km²). There were 192,672 housing units at an average density of 582 per square mile (225/km²). The racial makeup of the county was % White , % Black or African American , % Native American , % Asian , % Pacific Islander , % from other races , and % from two or more races. % of the population were Hispanic or Latino of any race. % were of German , % Irish and % English ancestry according to the 2000 census .