As of the census of 2000, there were 64,296 people, 30,301 households, and 16,544 families residing in the city. The population density was 1,246.9/km² (3,229.6/mi²). There were 31,425 housing units at an average density of 609.4/km² (1,578.5/mi²). The racial makeup of the city was 83.89% White, 9.36% Asian, 3.25% were multiracial. 1.96% from other races 1.07% African American, 0.33% Native American and 0.15% Pacific Islander. 5.99% of the population were Hispanic or Latino of any race.
11.8% were of English, 11.4% German, 10.2% Irish and 6.9% Italian ancestry according to Census 2000. 81.8% spoke English, 4.4% Spanish, 2.7% Chinese or Mandarin, 1.5% Tagalog, 1.3% Persian and 1.3% Russian as their first language.
There were 30,301 households out of which 20.9% had children under the age of 18 living with them, 45.7% were married couples living together, 6.7% had a female householder with no husband present, and 45.4% were non-families. 38.0% of all households were made up of individuals and 19.7% had someone living alone who was 65 years of age or older. The average household size was 2.09 and the average family size was 2.78.
In the city the population was spread out with 17.6% under the age of 18, 5.2% from 18 to 24, 27.1% from 25 to 44, 24.8% from 45 to 64, and 25.3% who were 65 years of age or older. The median age was 45 years. For every 100 females there were 85.8 males. For every 100 females age 18 and over, there were 81.5 males.
According to a 2007 estimate, the median income for a household in the city was $88,522, and the median income for a family was $106,942. Males had a median income of $70,482 versus $49,220 for females. The per capita income for the city was $37,875. About 1.7% of families and 3.7% of the population were below the poverty line, including 3.1% of those under age 18 and 3.6% of those age 65 or over.