As of the census2 of 2000, there are 16,290 people, 5,662 households, and 4,325 families permanently residing in the town. The population density is 678.5/km² (1,756.9/mi²). There are 5,760 housing units at an average density of 239.9/km² (621.2/mi²). The racial makeup among the "towns" (as opposed to gowns) is 81.10% White, 1.01% Black or African American, 0.15% Native American, 12.44% Asian, 0.09% Pacific Islander, 1.45% from other races, and 3.75% from two or more races. 4.76% of the population are Hispanic or Latino of any race.
There are 5,662 households out of which 35.1% have children under the age of 18 living with them, 67.7% are married couples living together, 6.5% have a female householder with no husband present, and 23.6% are non-families. 19.2% of all households are made up of individuals and 8.5% have someone living alone who is 65 years of age or older. The average household size is 2.59 and the average family size is 2.99.
In the town the population is spread out with 22.7% under the age of 18, 13.9% from 18 to 24, 18.6% from 25 to 44, 29.1% from 45 to 64, and 15.8% who are 65 years of age or older. The median age is 42 years. For every 100 females there are 89.2 males. For every 100 females age 18 and over, there are 84.5 males.
The median income for a household in the town is $98,080, and the median income for a family is $116,113. Males have a median income of $92,815 versus $51,296 for females. The per capita income for the town is $45,437. 2.9% of the population and 1.9% of families are below the poverty line. Out of the total people living in poverty, 3.5% are under the age of 18 and 1.0% are 65 or older.