As of the census of 2000, there were 4,818 people, 1,851 households, and 1,330 families residing in the town. The population density was 108.2 people per square mile. There were 2,058 housing units at an average density of 46.2 per square mile. The racial makeup of the town was 96.66% White, 1.08% Black or African American, 0.25% Native American, 0.54% Asian, 0.10% from other races, and 1.37% from two or more races. Hispanic or Latino of any race were 0.98% of the population. There were 1,851 households out of which 34.0% had children under the age of 18 living with them, 56.3% were married couplesliving together, 10.3% had a female householder with no husband present, and 28.1% were non-families. 21.4% of all households were made up of individuals and 8.1% had someone living alone who was 65 years of age or older. The average household size was 2.60 and the average family size was 3.04. In the town, the population was spread out with 26.0% under the age of 18, 6.7% from 18 to 24, 30.9% from 25 to 44, 25.5% from 45 to 64, and 10.8% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 100.9 males. For every 100 females age 18 and over, there were 98.3 males. The median income for a household in the town was $46,526, and the median income for a family was $53,313. Males had a median income of $38,981 versus $26,804 for females. The per capita income for the town was $21,785. About 5.9% of families and 7.7% of the population were below the poverty line, including 12.0% of those under age 18 and 7.0% of those age 65 or over.
Communities and locations in Nassau
Alps - A hamlet on NY 43 east of Denault Corners. The name stems from the mountainous terrain.
Denault Corners - A hamlet on the north town line at the junction of NY 43 and NY 66.
Dunham Hollow- A hamlet in the extreme northeast part of the town at the junction of NY 43 and Dunham Hollow Road. The community was named after Isaac Dunham, a pioneer citizen.
East Nassau - The Village of East Nassau is located along the corridor of NY 66, on the eastern town line.
Hoags Corners - A hamlet at the north end of East Nassau at the junction of NY 66 and Central Nassau Road. The community was named after W. B. Hoag, a pioneer citizen.
Jack's Corners - A hamlet on US 20 three miles east of the Village of Nassau.
Millers Corners - A hamlet in the northwest part of the town at the southwest corner of Burden Lake.
Nassau - The Village of Nassau is at the west town line, centered around the junction of US 20 and NY 203.
North Nassau - A hamlet in the north part of the town at the junction of Hoags Corners and North Nassau roads.
