As of the census of 2000, there were 9,305 people, 4,089 households, and 2,314 families residing in the borough. The population density was 12,563.3 people per square mile (4,855.0/km²). There were 4,287 housing units at an average density of 5,788.2/sq mi (2,236.8/km²). The racial makeup of the borough was 96.08% White, 1.05% African American, 0.17% Native American, 1.63% Asian, 0.05% Pacific Islander, 0.19% from other races, and 0.82% from two or more races. Hispanic or Latino of any race were 1.06% of the population.
There were 4,089 households out of which 25.1% had children under the age of 18 living with them, 41.6% were married couples living together, 11.7% had a female householder with no husband present, and 43.4% were non-families. 36.0% of all households were made up of individuals and 10.9% had someone living alone who was 65 years of age or older. The average household size was 2.27 and the average family size was 3.05.
In the borough the population was spread out with 21.3% under the age of 18, 9.3% from 18 to 24, 34.6% from 25 to 44, 20.8% from 45 to 64, and 14.1% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 89.4 males. For every 100 females age 18 and over, there were 85.0 males.
The median income for a household in the borough was $38,958, and the median income for a family was $51,826. Males had a median income of $36,286 versus $27,241 for females. The per capita income for the borough was $20,520. About 4.8% of families and 8.1% of the population were below the poverty line, including 11.2% of those under age 18 and 6.5% of those age 65 or over.