Niskayuna is a hamlet (and census-designated place) in Schenectady County, New York, United States.

[4] According to the United States Census Bureau, the CDP has a total area of 1.0 square mile (2.6 km2), all land.

[5] As of the census[8] of 2000, there were 4,892 people, 1,940 households, and 1,435 families residing in the CDP.

There were 1,983 housing units at an average density of 1,952.8 per square mile (754.0/km2).

22.3% of all households were made up of individuals, and 11.2% had someone living alone who was 65 years of age or older.