As of the census of 2000, there were 49,415 people, 16,819 households, and 12,866 families residing in the city. The population density was 996.8/km² (2,581.5/mi²). There were 17,145 housing units at an average density of 345.9/km² (895.7/mi²). The racial makeup of the city was 80.3% White, 1.50% Black or African American, 0.6% Native American, 16.2% Asian, 0.1% Pacific Islander, 7.2% from other races, and 4.0% from two or more races. 11.7% of the population were Hispanic or Latino of any race.
There were 16,819 households out of which 38.6% had children under the age of 18 living with them, 60.1% were married couples living together, 12.1% had a female householder with no husband present, and 23.5% were non-families. 19.1% of all households were made up of individuals and 7.9% had someone living alone who was 65 years of age or older. The average household size was 2.88 and the average family size was 3.30.
In the city the population was spread out with 27.6% under the age of 18, 7.6% from 18 to 24, 29.1% from 25 to 44, 23.2% from 45 to 64, and 12.5% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 93.2 males. For every 100 females age 18 and over, there were 89.6 males.
The median income for a household in the city was $60,013, and the median income for a family was $66,674 (these figures had risen to $72,414 and $86,606 respectively as of a 2007 estimate). Males had a median income of $49,548 versus $35,062 for females. The per capita income for the city is $25,993. 5.9% of the population and 3.9% of families are below the poverty line. Out of the total people living in poverty, 6.7% are under the age of 18 and 5.0% are 65 or older.