As of the censusGR2 of 2000, there were 4,410 people, 1,713 households, and 1,050 families residing in the CDP. The population density was 1,891.9/km² (4,919.1/mi²). There were 1,855 housing units at an average density of 795.8/km² (2,069.2/mi²).
There were 1,713 households out of which 29.6% had children under the age of 18 living with them, 39.5% were married couples living together, 15.4% had a female householder with no husband present, and 38.7% were non-families. 26.0% of all households were made up of individuals and 5.4% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 3.12.
In the CDP the population was spread out with 23.5% under the age of 18, 8.3% from 18 to 24, 33.2% from 25 to 44, 26.5% from 45 to 64, and 8.5% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 118.6 males. For every 100 females age 18 and over, there were 118.8 males.
The median income for a household in the CDP was $31,537, and the median income for a family was $38,029. Males had a median income of $23,714 versus $20,182 for females. The per capita income for the CDP was $14,346. About 19.2% of families and 20.5% of the population were below the poverty line, including 28.9% of those under age 18 and 16.2% of those age 65 or over.
The northern side of stock island is home to the Key West Golf Course and the Monroe County Detention Center. The southern side of the island is home to numerous mobile homes and marina's.