Quiogue

In the 2000 census, Quiogue had a population of 800 people, residing in 336 households, and 192 families. The population density was 635.7 inhabitants per square mile (245.4/km2). There were 545 housing units, with an average density of 433.1 per square mile (167.2/km2). The racial composition was 74.50% White (596 people), 11.00% African American (88 people), 1.00% Native American (8 people), 1.88% Asian (15 people), 7.00% from other races (56 people), and 4.62% from two or more races (37 people). Hispanic or Latino of any race were 14.38% (115 people) of the population.

Of the 336 households, 28.9% had children under the age of 18 living with them, 42.6% were married couples living together, 11.9% had a female householder with no husband present, and 42.6% were non-families. Individuals living alone comprised 36.3% of all households, and 17.6% had someone aged 65 or older living alone. The average household size was 2.38, and the average family size was 3.02.

The age distribution was 22.3% under the age of 18, 8.0% from 18 to 24, 31.0% from 25 to 44, 21.9% from 45 to 64, and 16.9% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 113.3 males. For every 100 females age 18 and over, there were 108.7 males.

The median household income was $50,759, and the median family income was $62,250. Males had a median income of $38,036 versus $31,696 for females. The per capita income for the CDP was $29,939. About 2.2% of families and 5.5% of the population were below the poverty line, including 5.5% of those under age 18 and 12.6% of those age 65 or over.