As of the census  of 2000, there were 226,778 people, 87,295 households, and 57,527 families residing in the county. The population density was 429 people per square mile (166/km²). There were 90,199 housing units at an average density of 171 per square mile (66/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 , % Polish , % Belgian and % Irish ancestry according to Census 2000 . % spoke only English at home, % spoke Spanish and % Hmong .