See studies by G. Cavender (1982) and H. E. Allen (1985).
According to the United States Census Bureau, the CDP has a total area of 11.9 square miles (30.7 km²), of which, 10.3 square miles (26.6 km²) of it is land and 1.6 square miles (4.1 km²) of it (13.25%) is water.
There were 6,645 households out of which 14.1% had children under the age of 18 living with them, 48.7% were married couples living together, 5.3% had a female householder with no husband present, and 44.2% were non-families. 37.7% of all households were made up of individuals and 18.4% had someone living alone who was 65 years of age or older. The average household size was 1.96 and the average family size was 2.54.
In the CDP the population was spread out with 12.2% under the age of 18, 5.8% from 18 to 24, 27.4% from 25 to 44, 27.6% from 45 to 64, and 27.0% who were 65 years of age or older. The median age was 48 years. For every 100 females there were 93.7 males. For every 100 females age 18 and over, there were 91.6 males.
The median income for a household in the CDP was $67,479, and the median income for a family was $82,988. Males had a median income of $60,601 versus $43,610 for females. The per capita income for the CDP was $39,102. About 0.2% of families and 2.7% of the population were below the poverty line, including 1.0% of those under age 18 and 3.5% of those age 65 or over.