As of the census of 2000, there were 25,315 people, 9,400 households, and 6,608 families residing in the city (2006 population estimate is about 31,000). The population density was 1,019.2/km² (2,640.1/mi²). There were 9,730 housing units at an average density of 391.7/km² (1,014.7/mi²). The racial makeup of the city was 88.21% White, 1.02% African American, 1.60% Native American, 3.82% Asian, 0.36% Pacific Islander, 1.89% from other races, and 3.10% from two or more races. Hispanic or Latino of any race were 4.83% of the population.
There were 9,400 households out of which 40.5% had children under the age of 18 living with them, 54.1% were married couples living together, 11.3% had a female householder with no husband present, and 29.7% were non-families. 23.5% of all households were made up of individuals and 10.4% had someone living alone who was 65 years of age or older. The average household size was 2.66 and the average family size was 3.15.
In the city the population was spread out with 30.1% under the age of 18, 7.9% from 18 to 24, 32.9% from 25 to 44, 17.7% from 45 to 64, and 11.3% who were 65 years of age or older. The median age was 33 years. For every 100 females there were 95.2 males. For every 100 females age 18 and over, there were 90.6 males.
The median income for a household in the city was $47,088, and the median income for a family was $55,796. Males had a median income of $42,391 versus $30,185 for females. The per capita income for the city was $20,414. About 3.7% of families and 5.6% of the population were below the poverty line, including 4.0% of those under age 18 and 5.9% of those age 65 or over.