Demographics

As of the census^[2] of 2000, there were 3,816 people, 1,982 households, and 1,323 families residing in the city. The population density was 288.5 people per square mile (111.4/km²). There were 3,843 housing units at an average density of 290.5/sq mi (112.2/km²).

There were 1,982 households out of which 8.4% had children under the age of 18 living with them, 63.1% were married couples living together, 3.0% had a female householder with no husband present, and 33.2% were non-families. 28.4% of all households were made up of individuals and 17.6% had someone living alone who was 65 years of age or older. The average household size was 1.93 and the average family size was 2.28.

The age distribution is 7.6% under the age of 18, 1.5% from 18 to 24, 9.4% from 25 to 44, 35.3% from 45 to 64, and 46.2% who were 65 years of age or older. The median age was 63 years. For every 100 females there were 89.5 males. For every 100 females age 18 and over, there were 89.3 males.

The median income for a household in the city was $93,986, and the median income for a family was $119,110. Males had a median income of $88,709 versus $49,539 for females. The per capita income for the city was $76,187. About 1.2% of families and 3.4% of the population were below the poverty line, including none of those under age 18 and 2.6% of those age 65 or over.