As of the census of 2000, there were 6,813 people, 2,845 households, and 1,772 families residing in the city. The population density was 2,121.5 people per square mile (819.5/km2). There were 2,992 housing units at an average density of 931.7 per square mile (359.9/km2). The racial makeup of the city was 88.1% White, 4.8% Hispanic or Latino, 3.0% Asian, 1.0% African American, 1.0% Native American, 0.4% Pacific Islander, 1.9% from other races, and 4.6% from two or more races. 14.6% were of German, 10.6% Irish, 10.0% English and 9.5% Norwegian ancestry. 95.3% spoke English and 2.6% Spanish as their first language.