Nassau is a village located in the Town of Nassau in Rensselaer County, New York, United States. The population was 1,133 at the 2010 census.
Nassau is located at 42°31′N 73°37′W / 42.517°N 73.617°W / 42.517; -73.617 (42.5152, -73.6111).
According to the United States Census Bureau, the village has a total area of 0.7 square miles (1.8 km²).None of the area is covered with water.
As of the census of 2000, there were 1,161 people, 490 households, and 321 families residing in the village. The population density was 1,705.2 people per square mile (659.2/km²). There were 529 housing units at an average density of 776.9 per square mile (300.4/km²). The racial makeup of the village was 96.99% White, 0.86% Black or African American, 0.43% Native American, 0.34% Asian, 0.09% from other races, and 1.29% from two or more races. Hispanic or Latino of any race were 0.86% of the population.
There were 490 households out of which 31.6% had children under the age of 18 living with them, 48.6% were married couples living together, 13.1% had a female householder with no husband present, and 34.3% were non-families. 29.0% of all households were made up of individuals and 12.4% had someone living alone who was 65 years of age or older. The average household size was 2.37 and the average family size was 2.92.
In the village, the population was spread out with 24.4% under the age of 18, 6.9% from 18 to 24, 29.5% from 25 to 44, 25.4% from 45 to 64, and 13.9% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 89.1 males. For every 100 females age 18 and over, there were 86.0 males.
The median income for a household in the village was $40,789, and the median income for a family was $49,500. Males had a median income of $37,986 versus $27,768 for females. The per capita income for the village was $19,199. About 5.3% of families and 7.3% of the population were below the poverty line, including 9.6% of those under age 18 and 10.9% of those age 65 or over.