As of the census of 2000, there were 67,171 people, 27,999 households, and 13,999 families residing in the city. The population density was 1,011.5/km² (2,619.3/mi²). There were 29,474 housing units at an average density of 443.8/km² (1,149.3/mi²). The racial makeup of the city was 87.88% White, 0.98% Black or African American, 1.48% Native American, 4.25% Asian, 0.17% Pacific Islander, 2.16% from other races, and 3.08% from two or more races. 4.63% of the population is Hispanic or Latino of any race.
There were 27,999 households out of which 23.1% had children under the age of 18 living with them, 37.5% were married couples living together, 9.2% had a female householder with no husband present, and 50.0% were non-families. 33.0% of all households were made up of individuals and 10.3% had someone living alone who was 65 years of age or older. The average household size was 2.24 and the average family size was 2.83.
In the city the population was spread out with 17.7% under the age of 18, 23.8% from 18 to 24, 26.5% from 25 to 44, 19.6% from 45 to 64, and 12.4% who were 65 years of age or older. The median age was 30 years. For every 100 females there were 92.6 males. For every 100 females age 18 and over, there were 90.6 males.
The median income for a household in the city was $32,530, and the median income for a family was $47,196. Males had a median income of $35,288 versus $25,971 for females. The per capita income for the city was $19,483. 20.6% of the population and 9.4% of families were below the poverty line. 17.2% of those under the age of 18 and 9.0% of those 65 and older were living below the poverty line.