As of the censusGR2 of 2000, there were 20,097 people, 8,458 households, and 6,301 families residing in the CDP. The population density was 530.4/km² (1,373.4/mi²). There were 9,228 housing units at an average density of 243.5/km² (630.6/mi²).
There were 8,458 households out of which 27.1% had children under the age of 18 living with them, 66.2% were married couples living together, 6.3% had a female householder with no husband present, and 25.5% were non-families. 21.5% of all households were made up of individuals and 11.7% had someone living alone who was 65 years of age or older. The average household size was 2.35 and the average family size was 2.72.
In the CDP the population was spread out with 21.1% under the age of 18, 3.3% from 18 to 24, 22.5% from 25 to 44, 25.8% from 45 to 64, and 27.3% who were 65 years of age or older. The median age was 47 years. For every 100 females there were 91.9 males. For every 100 females age 18 and over, there were 89.0 males.
The median income for a household in the CDP was $62,362, and the median income for a family was $69,688. Males had a median income of $48,852 versus $33,699 for females. The per capita income for the CDP was $35,213. About 2.6% of families and 3.7% of the population were below the poverty line, including 5.3% of those under age 18 and 1.6% of those age 65 or over.