According to the CA Dept. of Finance 2008, there were 46,934 people, 9,325 households, and 6,508 families residing in the city. The population density was 2,381.3 people per square mile (919.2/km²). There are about 9,872 housing units at an average density of 784.3/sq mi (302.7/km²). The racial makeup of the city was 62.30% White, 10% Black or African American, 0.50% Native American, 10.20% Asian, 0.30% Pacific Islander, 5.26% from other races, and 3.88% from two or more races. 13.50% of the population were Hispanic or Latino of any race.
There were 9,325 households out of which 35.4% had children under the age of 18 living with them, 56.9% were married couples living together, 9.1% had a female householder with no husband present, and 30.2% were non-families. 21.3% of all households were made up of individuals and 2.8% had someone living alone who was 65 years of age or older. The average household size was 2.65 and the average family size was 3.13.
In the city the population was spread out with 21.0% under the age of 18, 9.3% from 18 to 24, 44.1% from 25 to 44, 21.0% from 45 to 64, and 4.6% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 111.2 males. For every 100 females age 18 and over, there were 112.4 males.
The average income for a household in the city is $101,550. Males had a median income of $77,605 versus $48,116 for females. The per capita income for the city was $29,451. About 1.9% of families and 2.9% of the population were below the poverty line, including 3.2% of those under age 18 and 3.2% of those age 65 or over.