Nassau, New York

Nassau, New York
Town hall
Location in Rensselaer County and the state of New York.
Coordinates: 42°33′N 73°33′W / 42.550°N 73.550°W / 42.550; -73.550
CountryUnited States
StateNew York
CountyRensselaer
Incorporated1806 (as Town of Philipstown)
Government
  SupervisorDavid Fleming 
Area
  Total
45.24 sq mi (117.16 km2)
  Land44.44 sq mi (115.11 km2)
  Water0.79 sq mi (2.05 km2)
Elevation
919 ft (280 m)
Population
 (2020)
  Total
4,545
  Density100/sq mi (39/km2)
Time zoneUTC-5 (Eastern (EST))
  Summer (DST)UTC-4 (EDT)
ZIP code
12123
Area code518
FIPS code36-49517
GNIS feature ID0979250
Websitetownofnassau.org

Nassau is a town in Rensselaer County, New York, United States. The population was 4,545 in 2020, down from 4,789 at the 2010 census.

The Town of Nassau is at the southern border of the county.