
Westbury
- County:
- Nassau County
- County Seat:
- No
- Area (mi²):
- 2.344
- State:
- New York
Westbury is a village located in Nassau County, New York. Westbury has a 2025 population of 15,692. Westbury is currently declining at a rate of -0.15% annually and its population has decreased by -0.74% since the most recent census, which recorded a population of 15,809 in 2020.
The average household income in Westbury is $179,594 with a poverty rate of 3.79%. The median age in Westbury is 44.6 years: 43.9 years for males, and 45 years for females.